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HomeMy WebLinkAbout20051390 Ver 1_Complete File_20050725?0? Michael F. Easley, Governor CO William G. Ross Jr., Secretary ? DU G r~ North Carolina Department of Environment and Natural Resources -I O " y e "3 < Alan W. Klimek, P.E. Director Division of Water Quality July 29, 2005 DWQ Project # 05-1390 Haywood County Jack Horton, County Manager R1R@1EOW1R H p aywood County D Courthouse 215 North Main Street AUG 2005 Waynesville, NC 28786 DENR-WATER QUAu-y MTUINDS AND STCPJMATER BRANCH Subject Property: Pressley - Liner Site - East Fork Pigeon River (HC-102) Approval of 401 Water Quality Certification with Additional Conditions Dear Mr. Horton: You have our approval, in accordance with the attached conditions and those listed below, to place fill within or otherwise impact 1,550 feet of streams for the purpose of streambank stabilization at the subject properties, as described within your application received by the N.C. Division of Water Quality (DWQ) on July 25, 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. If you change your project beyond that authorized below, 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. The Additional Conditions of the Certification are: 401 Wetlands Certification Unit 1650 Mail Service Center, Raleigh, North Carolina 27699-1650 2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604 Phone: 919-733-1786 / FAX 919-733-6893 / Internet: http:!ih2o.enr.state.nc.us/ncwetlands No;ihCarolina .11aturally An Equal Opportunity/Affirmative Action Employer- 50°6 Recycledl109'o Post Consumer Paper Haywood County: Page 2 of 6 July 29, 2005 t 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 1,550 feet East Fork Pigeon 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. I Haywood County: Page 3 of 6 July 29, 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 should be avoided during the January 1 to April 15 rainbow trout spawning period to avoid adverse effects of sediment on eggs and larvae. 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. 8. All structures (berms, levees, etc...) preventing stream access to its floodplain shall be removed. Haywood County: Page d of 6 July 29, 2005 9. 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. 10.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. 11. 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. 12. 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. 13. 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. 14. Disturbed stream banks and a 25-foot vegetated zone, or the widest width that is practical under the site conditions, should be restored where possible 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 Haywood County: Page 5 of 6 July 29, 2005 (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 seeded with a native annual and perennial seed mix with a temporary nursery crop of wheat, millet or other grain. 15. 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. 16. 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. 17. Riparian Zone Replanting Replanting of vegetation within disturbed areas located within 25 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.) 18. 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. 19. 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. 20. 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. Haywood County: Page 6 of 6 July 29, 2005 t 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, ?61 Alan W. Klimek, P.E., Director Division of Water Quality AWWkhb Enclosures: GC 3367 Certificate of Completion Guidelines for Riparian Buffer Restoration cc: Ken Futreal, Southwestern NC R & D Council 367 Dellwood Road Building E, Suite 3 Waynesville, NC 28786 USACE Asheville Regulatory Field Office DWQ 401 Unit - Central Office DLR Asheville Regional Office File Copy Central Files Filename: 05-1345.EWP.Pressley-LinerSite-EastForkPigeonRive r.ApprovaI ii f r q ?P.' tr T ??1 f ? Detallsl rM,, Project Number: !20051390 Verslon: 1 Status: Issued LaslActlon Desc: 'Project Issued 'Project Name: Haywood County EWP HC-102 Pressley-Liner Sits 'Project Type: (Stream Restoration! Creation Project Desc: !EWP 'Owner: Horton, Jack Details... 'Received From: IAppllcant COE ID: "Primary County: Haywood DOTTIP: "Admin Region: Asheville y? r Received Dt M2512005 Reviewer: ikevin.barnett Issued Dt: 071290005 'SecondaryCounty Statutory Dt: 09!2312005 CAMA NEPAI9EPAReceived Dt: ? DCM Office: ( SW Plan Received DI: COE Office: I?evllle Regulatory Field Me - SW Plan Approved DI. Public Notice Published Dt. Last Updated By rob ridings SW Plan Location: Public Notice Received DI: Last Updated On 0712130005 Sewage Disposal: ! P.N Comment Period Ends Dt: ¦ Back I!. I Close ;Ready SID: WPD1 3 { i s i f t r i { fI j Triage Check List Date: 07/27/05 Kevin Barnett, Asheville Regional Office To: 60-day Processing Time: 7/25/05 to 9/23/05 From: Cyndi Karoly Telephone: (919) 733-9721 County: Haywood The file attached is being forwarded to you for your evaluation. Please call if you need assistance. ? Stream length impacted ? Stream determination Wetland determination and distance to blue-line surface waters on USFW topo maps ? Minimization/avoidance issues ? Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman) ? Pond fill Mitigation Ratios ? Ditching ? Are the stream and or wetland mitigation sites available and viable? ? Check drawings for accuracy Is the application consistent with pre-application meetings? ? Cumulative impact concern Comments: As per our discussion regarding revision of the triage and delegation processes, please review the attached file. Note that you are the first reviewer, so this file will need to be reviewed for administrative as well as technical details. If you elect to place this project on hold, please ask the applicant to provide your requested information to both the Central Office in Raleigh as well as the Asheville Regional Office. As we discussed, this is an experimental, interim procedure as we slowly transition to electronic applications. Please apprise me of any complications you encounter, whether related to workload, processing times, or lack of a "second reviewer" as the triage process in Central had previously provided. Also, if you think of ways to improve this process, especially so that we can plan for the electronic applications, let me know. Thanks! Project Name: Haywood County EWP HC-102 Pressley-Liner Site DWQ #:05-1390 (GG> ` `?GZLciL Office Use Only: USACE Action ID No. DWQ No. Version October 2001 If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. 1. Processing Q U R? no V D lJ D 1. Check all of the approval(s) requested for this project: ® Section 404 Permit JUL 2 5 2005 ? Section 10 Permit ® 401 Water Quality Certification ViETUNDSANDSTORrVAQUALITY TERBWXJJ ? Riparian or Watershed Buffer Rules 2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 37 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII - Mitigation), check here: E] H. Applicant Information 1. Owner/Applicant Information Name: Haywood County - Jack Horton, County Manager Mailing Address: County Courthouse 215 N. Main Street Wavnesville, North Carolina 28786 Telephone Number: 828-452-6625 Fax Number: 828-452-6715 E-mail Address: jliorton a haywoodne.net 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Ken Futreal Company Affiliation: Southwestern NC RC&D Council Mailing Address: 367 Dellwood Road Buildin( E, Suite 3 Wavnesville, N.C. 28786 Telephone Number: 828-400-3279 Fax Number: 828-452-7031 E-mail Address: kfutreal wyahoo.com Page 5 of 12 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project:Havwood County Emergency Watershed Protection Program (HC-102) 2. T.I.P. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): Pressley-Liner Site (See attached sheet for 4. Location County: Haywood Nearest Town: Cruso Subdivision name (include phase/lot number): Directions to site (include road numbers, landmarks, etc.): This repair section of the East Fork of the Pigeon River is located off Cruso Road (US 276) and Mountain Crest Lane, approximately 5.4 miles southwest of the intersection of US 276 and US 110. 5. Site coordinates, if available (UTM or Lat/Long): (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or condition of the site at the time of this application: Land use is residential. 7. Property size (acres): See attached sheet for acreages. 8. Nearest body of water (stream/river/sound/ocean/lake): Fast Fork of the Pigeon River 9. River Basin: French Broad (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at lhttp://h2o.enr.state.nc.us/admin/maps/.) Page 6 of 12 10. Describe the purpose of the proposed work: Stream bank repair and stabilization. When possible excavation equipment (backhoe) will access deposition areas from the stream bank and not encroach into the stream channel. The work described in this Stream Repair and Bank Stabilization Plan (Repair Plan) is urgent and compelling wort: under the National Resource Conservation Service (MRCS) Emel-ency Watershed Protection (EWP) pro(ram to protect existintY property and structures. 11. List the type of equipment to be used to construct the project: Excavators, dozers and dump trucks 12. Describe the land use in the vicinity of this project: Residential. 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 pennits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. V. Future Project Plans Are any 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: None anticipated VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. Page 7 of 12 1. Wetland Impacts Wetland Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Located within 100-year Floodplain** (es/no) Distance to Nearest Stream (linear feet) Type of Wetland*** n!a * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, 1111, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at httna/www.fema.oov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: n/a Total area of wetland impact proposed: n/a 2. Stream Impacts, including all intermittent and perelmial streams Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? (please secif ) I Fill and excavation 1550' East Fork of the Pigeon River 30'-100' Perennial * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at I-800-358-9616, or online at w\%,c.usits.L,0V. Several internet sites also allow direct download and printing of USGS maps (e.g., \\ww.topo/one.com, www.mapquest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 1550 if Page 8 of 12 3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Name of Waterbody (if applicable) Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) n/a * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging, flooding, drainage, bulkheads, etc. 4. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream Describe the method of construction (e.g., dam/embankment, excavation, draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The stream bank on both sides needs to be repaired and restored to avoid continued sedimentation and future destruction of property. Restoring the channel to the pre-storm conditions and stabilizing the stream banks will provide the appropriate protection against future high water storm events. Access for this repair work is alone Mountain Crest Road and possible along Cruso Road. When at all possible, equipment will be kept out of the strearn channel and stream crossinp_s vvill be minimized. Temporary and permanent herbaceous vegetation shall be planted on all bare soils within 15 days of ground disturbing activities. ? wetlands installation of Page 9 of 12 VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/strin<!i(ie.litm]. 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. 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that you would like to pay into the NCWRP. Please note that payment into the NCWRP must be reviewed and approved before it can be used to satisfy mitigation requirements. Applicants will be notified early in the review process by the 401/Wetlands Unit if payment into the NCWRP is available as an option. For additional information regarding the application process for the NCWRP, check the NCWRP website at http://h2o.eiir.state.ne.its/\vip!index.htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Page 10 of 12 Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): IX. Environmental Documentation (DWQ Only) Does the project involve an expenditure of public funds or the use of public (federal/state/local) land? Yes ® No ? If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ? No ® If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required Mitigation 1 3 2 1.5 Total Page 11 of 12 * Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 213 .0242 or .0260. XI. StormNvater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. n/a XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ? No Is this an after-the-fact permit application? Yes ? No XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). Due to Federal re-.ulations re-,arding the use of EWP, funding construction of all EWP work mist be under construction by September of 2005. Page 12 of 12 (Agent's signature is valid only if an authorization letter from the applicant is provided.) Property Owners for the Pressley-Liner Site (Starting Upstream) Property Owner Pin # Acre-age Owner Address F.D. & Louise Pressley 8663538447 55.5 407 Mountain Crest Lane, Canton, NC 28716 David & Rile Shuford 8663435081 3.1625 12489 Cruso Road, Canton, NC 28716 Alexander & Joan Robb 8663435248 4.11 184 Leatherwood Road, Waynesville, NC 28786 Carl & Desiree Feest 8663434409 0.88 3326 W. Park Road, Hollywood, FL 33021 George Beistel 8663433587 1.6375 1506 Abbe Cir, Asheville, NC 28805 Dennis Strickland 8663434859 1.479 3441 25th Ave SW, Naples, FL 34117 Carroll & Ma Ellen Pressley 8663443041 1.5196 12287 Cruso Road, Canton, NC 28716 Harry & Cheryl Liner 8663446544 5.011 108 Springdale Lane, Canton, NC 28716 Harry & Cheryl Liner 8663445446 0.393 108 Springdale Lane, Canton, NC 28716 Christopher Lowe 8663442204 4.61 12261 Cruso Road, Canton, NC 28716 East Fork, LLC 8663457365 65.742 P. O. Box 5818, Hilton Head Island, SC 29928 401/404 PERMITTING PACKAGE HC-102 PRESSLEY-LINER SITE HAYWOOD COUNTY EWP HAYWOOD COUNTY, NORTH CAROLINA 1 McGill ASSOCIATES CONSULTING ENGINEERS ASHEVILLE, NORTH CAROLINA 1 STREAM REPAIRS & BANK STABILIZATION PLAN FOR Pressley-Liner Haywood County, North Carolina L?MV" i ? ?i! f e 4 ! 4. '.i 77 Prepared for HAYWOOD COUNTY SEAL 24993 Prepared by: :_ McGill ASSOCIATES July 2005 In conjunction with: ' Soil & Environmental Consultants, PA ' Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. ' 1. PROJECT PURPOSE & DESCRIPTION The purpose of this project is to stabilize and/or repair eroded and unstable stream banks along the East Fork of the Pigeon River that were impacted by flood flows from Hurricanes Frances and Ivan in September of 2004. The severely eroded stream banks consist of exposed soil on moderate to steep slopes, which, if transported during another ' high flow event, could block downstream culverts and bridges as well as cause increased erosion and sedimentation in vulnerable High Quality waters. As desired by the landowner(s) and charged to us by Haywood County, NC, the proposed design is ' intended to reconstruct the damaged bank(s) as "close as possible" to the original pre- disturbance conditions. This site is not within a designated Critical Habitat for the Appalachian Elktoe Mussel (Alasmidonta raveneliana) (AE) zone. However, the ' continued sedimentation occurring from this damaged site is an ongoing impact to the downstream waters and its careful, quick repair is critical to protecting stream resources. ' The work described in this Stream Repair and Bank Stabilization Plan (Repair Plan) is urgent and compelling work under the National Resource Conservation Service (NRCS) Emergency Watershed Protection (EWP) program to protect existing property and structures. NRCS is the funding agency and Haywood County / Haywood Soil and Water Conservation District (SWCD) is the sponsor and responsible party for the project. Work on the site consists of repair and stabilization effort only, and is not considered ' natural channel restoration or enhancement work. However, some methods and approaches utilized in the proposed repairs are routinely applied in natural channel design efforts due to their ability to protect channel banks from shear stresses and the resultant erosion. All work in or near surface waters will be fully supervised by trained personnel from both ' McGill Associates and Soil & Environmental Consultants (S&EC). This site is just one of seventeen (17) similarly damaged sites selected for repair within Haywood County as part of Haywood County bid invitations HC-102, HC-103, and HC-104. Each of the sites ' is considered independent of one another (non-contiguous) due to the physical separation typically in excess of several thousand feet between sites. 2. SITE DESCRIPTION Sites #15 & 16 - Pressley-Liner Site - East Fork of the Pigeon River (WS-III, Tr Waters) ' The repair site is approximately 1550 feet in length and is located along tile East Fork of the Pigeon River in Haywood County, NC. This area is located off Cruso Road (US 276) and Mountain Crest Lane, approximately 5.4 miles southeast of the intersection of US 276 and US 110. Please refer to repair plans for photographs, mapping, imagery, and details of existing site conditions. ' Approximately 1550 feet of both channel banks were severely damaged through bank erosion and soil loss. The repair is located on property owned by East Fork LLC, Mr. 1 Christopher Lowe, Mr. Hart' and Mrs. Cheryl Liner, Mr. Carroll and Mrs. Mary Ellen 2 l y 005 Pressley-Liner - Stream Repairs & Bank Stabilization Plan Ju Haywood County Invitation # HC-102 McGill Associates, P.A. Pressley, Mr. F.D. and Mrs. Louise Pressley, Mr. Dennis Strickland, Mr. George Beistel, Mr. Carl Feest, Mr. Alexander and Mrs. Joan Robb, and Mr. David and Mrs. Riley Shuford . Banks along the repair reach range in height from roughly 7 to 17 feet and are near vertical in some locations. Based on a review of available mapping and imagery, the width of bank loss varies from 5 feet to as much as 25 feet along the repair reach. ' No repairs have been performed along the repair reach at this time and the existing (failed) banks are continuing to erode. Little to no available repair materials exists along ' this portion of the reach. Access to the site will be via a driveway located on Mr. and Mrs. F.D. Pressley's property ' and a driveway located on Mr. and Mrs. Harry Liner's property, which are close to the river. Because of dense vegetation, an alternate access point may need to be coordinated with the Owner. Where visible, site utilities were located as described on the site repair plan. Utilities must be located and marked by contractor prior to construction. The disturbed area for the proposed repair and stabilization is 2.7 acres. Therefore, Haywood County will have to secure an Erosion Control Permit from the N.C. Division of Land Quality. The Pressley-Liner site work described in this plan will need to be permitted by the U.S. Army Corps of Engineers (Section 404 permit) and also the N.C. Department of Environment and Natural Resources, Division of Water Quality (Section 401 Water Quality Certification). 3. TECHNICAL REPAIR DESCRIPTION f di current ng o Members of our design team visited the repair site to gain an understan site conditions and perform a general site characterization. While on site, we observed ' characteristics of the site and surrounding area, verified surface and channel flow conditions, and observed existing property boundaries, select utilities, site accessibility, and existing water conveyance structures. During this process, we observed exposed eroded banks along the repair reach (which were caused by the hurricanes) to typify failed bank height, slope, materials, vegetation, and general site conditions. ' While on site, we also observed existing channel banks immediately upstream and downstream of the repair area as well as the existing channel banks on the opposite side of the watercourse (in most cases only one bank of the existing channel was damaged). t Utilizing GPS, laser-level and Total Station equipment, we collected select site data to locate the extent of the damage and characterize the existing conditions along the repair reach. We field measured one or more bank cross-sections while on site. The cross- section(s) location were selected to typify the existing bank condition along the repair reach. We photographed the project sites and prepared field notes for use in the ' preparation of our design. A plan sketch of the existing site conditions along typical cross-section(s), taken along the repair reach, is shown in the Construction Drawings. 7 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. After completing our field visits, we performed a preliminary review and evaluation of available site mapping to include USGS 7.5 Minute Quad data, Digital Orthophoto Quad (DOQ) data (1998), Color Infrared imagery (2004), Haywood County Soils Survey map sheets, as well as other available map data. Using Arc-GIS (with available extensions) and Digital Elevation Models (DEM) from the NC Floodplain Mapping Project, we estimated the contributing drainage area (at the project site) at approximately 34.5 square miles. We also researched available hydrologic and hydraulic data for the project site, including a review and evaluation of available Regional Curve data (NCSU - Stream Restoration Institute (SRI), Preliminary Mountain Curve) for incorporation into the repair design process as applicable. Using the data collected during our field visits, we developed a rough site sketch defining existing conditions with annotated hand notes, descriptions, and repair recommendations. These notes were later refined for use in the development of our repair "concept" for the site roughly defining the locations, sizes, and types of modifications and features proposed for construction at the site. In addition to the Existing Site Plan, we also developed our Proposed Repair Plan including plan view, typical repaired bank cross-sections, construction details for typical site features, technical construction specifications, and planting recommendations for the recommended repairs. 4. DESIGN CONSIDERATIONS As described in our technical proposal, we considered a range of possible repair ' alternatives for the Pressley-Liner Farm Site. These repair alternatives included: 1) Repair-in-Place Only, 2) Repair-in-Place augmented with In-Stream Structures, 3) Stream Restoration - "Natural Channel Design." u As our understanding of this and other repair sites has increased, and in an effort to streamline the approach to repairs, we further developed these repair alternatives. In our design development, we strived to utilize techniques which would be simple and understandable to a "typical" general contractor (reducing the need for specialty contractors) and which could be easily modified or refined in the field by the designer (or contractor) based on site conditions encountered during construction. It was also our intent that repair and stabilization methods would be constructed with commonly used and readily available construction materials. Recommended repairs have been designed with robust methods to withstand typical channel discharges and erosive channel forces. One commonly observed approach to such bank repairs includes a complete lining of repaired banks with large boulders or riprap. It is our opinion that such an approach would be undesirable for three main reasons. 1.) These repairs do not take into account the primary reason for the damage in the first place, that of excessive shear stresses on the bank and tend to serve as a "band- aid" approach to bank repairs. 2.) Such repairs utilize excessive volumes of rock resulting in considerably high repair costs. 3.) The placement of large volumes of rock 4 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. for continuous lengths in effect "armors" the banks and fails to provide the desired ' (reconstructed) habitat that previously occurred naturally within the system (boulder, cobble, gravel substrate materials) bed and banks. Such habitat is key to a variety of aquatic species. ' Our selected repair alternative for the site includes repairing the failed banks back to their pre-disturbance location (through fill placement) and augmenting the repair with in- stream structures. The proposed repair plan calls for the utilization of off-site borrow materials including riverbed borrow consisting of sand, gravel, cobble, and small boulders for the reconstruction of the lower bank zone. Elevations above the lower bank zone will be constructed utilizing varying fill materials including both riverbed borrow and other suitable borrow sources. ' Based on the observed (and measured) condition of the failed bank and the amount of disturbance that has occurred the bank repair alone (without supplemental in-stream structure reinforcement) would likely be insufficient to withstand future flood flows. The ' installation of in-stream rock (boulder) structures will reduce near bank stresses along the repair reach to protect the rebuilt banks. Additionally, our repair also calls for the installation of toe stabilization as necessary along the reach in areas of excessive scour in ' tie-in to existing stabile banks. The designer may also designate other areas requiring toe stabilization at the time of construction. ' This approach to bank repairs will improve the overall potential for the success of the repair. The installation of structures will protect channel banks with a significantly smaller rock volume (when compared to bank lining) thereby reducing overall repair costs. One additional benefit to this type of repair is the replacement of a natural (less structural) repair that is more appropriate for the reach and generally more aesthetically desirable. 5. PROPOSED REPAIR PLAN t During our evaluation of the site, infrared imagery (2004) was used to estimate the pre- disturbance location of the "channel bank." This location was then used to develop the repaired banks location as shown in our Repair Plan. Typical cross-section(s) for the ' repair were then developed to depict proposed repair characteristics including but not limited to slopes and slope breaks, stabilization methods, and planting recommendations. ' NOTES: 1. Our repair plan is designed to repair and stabilize the banks along the subject reach and is not considered rnalural channel restoration or enhancement work. III addition, while consideration was given to select characteristics of the channel, it ' should be recognized that a complete morphological evaluation of the repair reach was not performed nor does this report (or repair) represent such an evaluation. However, some methods and approaches utilized in the proposed ' Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. repairs are routinely applied in natural channel design efforts due to their ability ' to protect channel banks front shear stresses and the resultant erosion. 2. It should be noted that this "channel bank" location and the resultant "channel ' width" is not to be considered the bankfidl channel edge or bankf ll width (as is routinely described in Natural Channel Design Methodology), nor should it be considered the "edge of water" as this location will differ for various reasons. It ' is however, a rough interpretation (estimate) of the pre-existing channel bank location based on the best available pre-dannage site and mapping data, discussions with landowners, observation of undisturbed channel segments ' immediately upstream and/or downstream of the site, and experience on similar projects. 3. Due to previous alterations of the channel including but not limited to bridge ' construction, bank grading, the construction of flood levees, and inn-channel quarry operations, channel banks, widths, and slopes have been modified ' considerably. In turn, the identification of the "natural" condition (distension, pattern, and profile) of the channel is often difficult or indeterminate. For comparison purposes, we attempted to confirm our "channel bank" location by comparing the resultant "channel width" to available Regional Curve data. Based on a review of site data (upstream and/or downstream) and our estimated "channel bank" location, we estimated the pre-disturbance "channel width" at approximately 68.0 feet. We compared this "channel width" to estimated bankfull width as determined from available (preliminary) mountain Regional Curve data (SRI) for the appropriate drainage area. The regional curve indicates a bankfull width of approximately 72.9 feet based on a drainage area of 34.5 square miles. Based on this comparison it is our opinion that the estimated pre-disturbance "channel location" is appropriate. As shown on the attached repair plans and design details, we recommend that the repaired slope be reconstructed and backfilled with excavated channel material (or deposited material recovered from the floodplain), available on-site or off-site earth fill, and in some cases imported stone aggregate. The location of the toe of the repaired slope will be field determined to allow for the development of a typical repair application along the reach. Our Repair Plan calls for the incorporation of a single repair option, Option 1 for both banks. See the proposed repair cross-sections depicted in the Repair Plan. Repair Option 1 For Repair Option 1, our design has divided the repaired bank into three bank zones, Upper, Mid-, and Lower for the purposes of slope, stabilization measures, and planting recommendations. A floodplain of varying width will be constructed between the Lower and Mid-Bank Zones. 6 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. Grading & Stabilization 1 We recommend that the Lower Bank Zone be graded (or constructed) with the previously described materials at a slope not in excess of 2H:1 V to the approximate elevations described in the repair cross-section. As this zone is t within the "active channel" we recommend that it be lined with CF-7 (coir fiber) erosion control matting (or equivalent), planted with live stake (cuttings) of the species and density described in the planting details. This zone should be over ' seeded with the appropriate temporary and permanent grasses for the season. ' Repair Option 1 will include the construction (or grading) of a floodplain extending landward from the elevation break-point between the Lower and Mid- Bank Zones (Proposed Slope Break). The width of this bench will depend on the available area (based on landowner desires and site constraints) and the necessary fill volume. A minimum bench width of 5 to 10 feet is desired. However, the floodplain will likely be well in excess of this minimum along most of the repair ' reach. The back of this bench should then be graded and tied to the existing top of bank (terrace) elevation at a slope not greater than 3H:1 V as described below as the Mid-Bank Zone. The upstream and downstream ends of the bench will be graded to blend smoothly with the existing undisturbed banks. The Mid-Bank Zone should be similarly graded (or constructed) with the previously described materials at a slope not in excess of 3H:1 V to the approximate elevations described in the repair cross-section. As this zone is out of the "active channel", we recommend that it be lined with excelsior (wood fiber) ' erosion control matting (or equivalent) and planted with select trees and shrubs (bare root or containerized specimen) of the species and density described in the planting details. This zone should also be similarly over seeded with erosion control grasses. Where possible, transplanting of woody vegetation from on-site, including root mats, will be performed to assist in the stabilization of banks within the bench, Lower, and Mid-Bank Zones. NOTES: ' 1. The repair cross-sections shown are used to describe the repair cross- section are typical and intended to describe existing and repaired bank conditions at a location coincident with the measured field cross-section. 2. The vertical datum to which this is applied (existing top of bank) and the vertical and horizontal distances depicted in the repair cross-section are typical, however, there will be some variation and should therefore be verified and adjusted as necessary along the length of the repair reach. 1 3. The Proposed Top of Bank depicted on the Repair Plan defines the approximate location of the break between the Lower Bank Zone and the streamside edge of bench. 7 7 7 d I Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. The Upper Bank Zone should be graded (or constructed) with the previously described materials such that it blends the Mid-Bank Zone with the surrounding floodplain grade to the approximate elevations described in the repair cross- section. As this zone is out of the "active channel", we recommend that it be lined with excelsior (wood fiber) erosion control matting (or equivalent) and be planted with select tree (bare root or containerized specimen) and shrubs of the species and density described in the planting details. This zone should also be similarly over seeded with erosion control grasses. In-channel Structures As previously described, we recommend that the repaired channel banks be augmented with in-channel structures including rock (boulder) J-hook and rock cross-vanes. These structures will be utilized to reinforce and stabilize the proposed bank repairs. All structures will be constructed out of natural materials typically consisting of locally quarried boulders. The upstream side of these structures will be lined with a non-woven fabric and backfilled with excavated channel material and in some cases imported stone (off-site river bed borrow materials or other available coarse aggregate if approved by the designer) to improve stability and reduce the potential for piping. These in-stream structures concentrate stream energy toward the center of the channel and away from the near-bank areas. In doing so, the structure reduces shear stress along the banks and prevents bank erosion. (In this case, such structures allow for an additional measure of protection of the repaired bank until vegetation can take hold). This approach would also likely reduce the overall volume of stream stabilization material that must be hauled to the site and reduce costs for the overall repair. The attached Repair Plan generally describes the number and type of in-channel structures to be installed. The designer will determine the exact spacing, length, and location of the in-channel structures at the time of construction. For planning purposes, we estimate that a minimum of five (5) rock (boulder) J-hook and three (3) rock cross-vane structures will be installed along the repair reach. A detail of a J-hook and cross-vane structures are shown in the Construction Drawings. J Toe Stabilization Measures Depending on conditions encountered during construction, occasions may arise where supplemental stabilization of the bank toe is necessary. Where such conditions are encountered, banks would be reconstructed using rows of large boulders along the newly defined toe of the repaired bank. Footer rocks (boulders) and toe rocks (boulders) will be installed as shown in the details. In these cases, the landward side of these structures will be lined with a non-woven geotextile fabric and backfilled with suitable material (off-site river bed borrow 8 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. materials or other available coarse aggregate if approved by the designer). This material combination in conjunction with a more suitable slope (likely not in excess of 2H:1 V) will improve stability and reduce the potential for future scour and piping (and resulting failure). The designer will determine the exact location and extent of toe stabilization measures at the time of construction. However, areas typically in need of such supplemental protection include areas of existing scour (where sub-grade reconstruction would be difficult), near existing large diameter trees (having experienced undercutting) which are to be maintained, and at the upstream and downstream repair limits (where tie-in to undisturbed banks is needed). For planning purposes, we have estimated that 2,100 linear feet of the repaired banks will require toe stabilization measures. In addition, the upper approximately 300 feet of the right bank (looking downstream), along the Section A repair, will require more significant toe stabilization (approximately 7-8 feet tall) as shown on the Construction Drawings. A detail of typical toe stabilization construction is shown on the Construction Drawings. Bank Plantings G r H J u A riparian buffer area will be established along the repaired channel bank as part of the proposed Repair Plan. The riparian zone will include all three Bank Zones (Lower, Mid-, and Upper) and any constructed bench. These areas will be seeded and planted with the appropriate native riparian vegetation and will provide channel stability and treatment of surface waters traveling laterally through the buffer. Species will consist primarily of native trees and shrubs. The repaired bank will be planted with the appropriate channel bank species in the form of live stakes, bare-root seedlings (and containerized plants), and transplants where available. Native trees and shrubs that are available elsewhere on site will be removed with as much of the root ball intact and transplanted adjacent to the restored channel or in the floodplain. The majority of the planting efforts (with the exception of site transplants) should be delayed until the fall season to increase survivability. Vegetation will be supplied by locally identified plant sources or purchased from local, reputable nurseries. Other sources, outside of the local area, may be used depending on the availability of plant material and as approved by the designer. Tree and shrub species will be planted between the slope break (waterside of the floodplain bench and top of the lower bank zone) and the existing top of the bank. Tree and shrub species individuals will be planted randomly at a 50:50 mix with a 6 ft. by 6 ft. spacing in order to ensure a desired planting density of 1,200 stems per acre. This will increase the potential for the desired 5-year survivability. The planting plan will include a minimum of five of the nine tree species listed in the planting schedule. Plants shall be installed as shown in the planting details. Tree protection shelters shall be installed on all planted bare-root seedlings. The 9 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. planting plan will include a minimum of three of the seven shrub species listed in the planting schedule. Live stakes are specified and will be planted on a spacing of 3 ft. by 3ft. consisting of Black Willow, Silky Willow, and Silky Dogwood species randomly intermixed. Live stakes will be cut and installed as shown in the planting details. Representatives of S&EC and McGill Associates will be on site to observe and direct planting efforts associated with the buffer restoration. Substitution of tree, shrub, and live stake species must be approved in advance by the designer. Temporary and/or permanent seeding measures (German millet, rye grass, or the most appropriate erosion control grass as dictated by the season or region) will be applied to areas disturbed during grading operations to allow for localized stabilization while riparian species establish themselves. Construction Drawings for the proposed Stream Repair and Bank Stabilization Plan including the existing site conditions, the proposed repairs, a construction sequence, repair cross-sections, structure details, erosion and sediment control details, and a planting schedule and details are attached. Technical Specifications are also attached. 6. REGULATORY REQUIREMENTS 401 WATER QUALITY CERTIFICATION (Mandatory Requirement based on expected Certification conditions) - The following mandatory conditions apply to all repair sites: 1. Erosion & Sediment Control Practices 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. 10 J I L Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. d. The reclamation measures and implementation must comply with the reclamation in accordance with the requirements of the Sedimentation Pollution Control Act. 2. 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. 3. 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. 4. 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. 5. 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, unless authorized under Division of Land Resources Erosion and Sediment Control approval. 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. 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. 11 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. 7. The channel must 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. Streambed materials are unstable in flowing-water situations and are unsuitable for bank stabilization. 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. 1 8. 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 streambed materials are available. Berms are not permitted because they block the floodplain, constrict and accelerate flood flows, and often fail or impede drainage during large flood events. 9. 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. 10. 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, t lubricants, hydraulic fluids or other toxic materials. Equipment used in stream channel must be clean, new or low-hour equipment. e J 11. As long-term stream stability is a concern with this type of work, it is strongly recommended that woody vegetation be established along stream banks where possible. Any riparian vegetation planting should be performed in accordance with the Guidelines for Riparian Buffer Restoration. (litt1)://h2o.enr.state.nc.ushvrp/pdf/buffers.pdf ) 12. Monitoring - The Permittee shall examine the stabilization work done under this Certification on an annual basis for three (3) years following the completion of the restoration efforts. This field evaluation should note the condition and stability of the measures installed and how well the repair is holding up. A written report must be provided to DWQ's Asheville Regional Office by June ls` of each year. The report must describe inspection results, include digital photographs, list the date of inspection, and describe any needed repairs or corrections. 12 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. ' 13. The Permittee will provide on-site supervision of stability work including, but not limited to bank re-sloping, in-stream structure placement, and riparian zone re-establishment by an appropriately trained individual. 14. If pasture along the stream is to be used for grazing, the Permittee must inform the appropriate landowners that cattle should be prohibited from damaging riparian areas and from de-stabilizing the stream banks and channel. 15. Diffuse Flow - All constructed storm water 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. i Ui J 16. Water Quality Certification Notifications - The Permittee must provide a copy of this issued Water Quality Certification and attached cover letter to each property owner where the approved work will be performed. 17. Turbidity Standard - The turbidity standard (Nephelometric Turbidity Units) shall not be exceeded as described in 15A NCAC 213 .0200. Appropriate sediment and erosion control practices must be used to meet this standard. Finally, pending receipt of a final 404 Permit and 401 Certification, copies of these issued documents and the associated conditions and comments provided by commenting agencies (when available) will be included in all final contractor packages that will be used for construction of the repairs. All regulatory requirements and the measures outlined in this document will be fully discussed with the chosen contractor and the inspectors for McGill and S&EC before any construction begins. During actual construction, inspectors will direct contractors to observe and apply good construction practices and the requirements described in this document. 1 13 I t 1 s 1 I CROSS-SECTIONS Site # 15&16 Cross Section # 1 Site Name PRESSLEY-LINER Date Collected 5/6/2005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 100.62 20 0+20 100.74 25 0+25 99.761tob 26 0+26 97.80 28 0+28 93.25 31 0+31 92.86 37 0+37 93.10 46 0+46 93.36 58 0+58 93.80 70 0+70 94.25 78 0+78 94.68 EOW - right 85 0+85 95.47 97 0+97 96.08 110 1+10 96.45 122 1+22 95.88 133 1+33 94.86 141 1+41 93.89 147 1+47 93.34 EOW - left 153 1+53 92.98 158 1+58 93.24 EOW - right 163 1+63 96.10 166 1+66 100.80 173 1+73 100.55 Typical Cross-section (Downstream End of Reach) Site #14 - Pressley-Liner Site 105 100 95 c 0 m ? ai 90 - Existing Edge of W Water - Water Surface (Approx.) 85 LOOKING DOWNSTREAM 80 0 20 40 60 80 100 120 140 160 180 Station (ft.) Site # 15&16 Site Name PRESSLEY-LINER Date Collected 5/6/2005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 101.2842 10.92 0+11 102.4168 18.71 0+19 103.9964 22.7 0+23 104.156 TOB - left 24.53 0+25 100.7421 26.48 0+26 98.5602 27.42 0+27 97.8054 29 0+29 97.3557 EOW - left 31.63 0+32 96.7987 38.56 0+39 96.2908 43.28 0+43 95.7615 46.11 0+46 95.9761 50.22 0+50 96.5936 55.27 0+55 96.3837 63.19 0+63 96.4985 69.5 0+70 96.5071 75.91 0+76 96.2142 80.77 0+81 96.3203 90.5 0+91 96.5443 97.06 0+97 96.2079 103.08 1+03 95.9261 107.47 1+07 95.4119 109.63 1+10 95.9192 109.81 1+10 97.4299 EOW - right 109.9 1+10 99.2127 112.36 1+12 100.8167 116.01 1+16 101.7039 118.47 1+18 102.1972 120.87 1+21 103.3521 Cross Section # 2 Typical Cross-section (Middle of Reach) Site #14 - Pressley-Liner Site 110 10s 100 e ° e-- p 95 , .. > Existing Edge of LL 90 Water - Water Surface (Approx.) 85 LOOKING DOWNSTREAM 80 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 1+10 1+20 1+30 Station (ft.) Site # 15&16 Cross Section # 3 Site Name PRESSLEY-LINER Date Collected 5/6/2005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 103.2309 2.66 0+03 102.4013 7.14 0+07 101.4384 11.85 0+12 100.7557 EOW -left 15.32 0+15 100.1745 21.08 0+21 99.7977 29.56 0+30 99.3728 34.57 0+35 98.5716 49.51 0+50 97.4006 52.82 0+53 99.5038 58.65 0+59 100.7782 EOW - right 65.37 0+65 102.8841 70.81 0+71 105.7202 74.58 0+75 107.8684 75.69 0+76 109.9448 76.94 0+77 111.7101 78.62 0+79 114.6395 TOB - right 83.6 0+84 114.2828 Typical Cross-section (Upstream End of Reach) Site #14 - Pressley-Liner Site 120 115 110 105 c 100 > L 95 L Existing Edge of Water- Water 90 _ Surface (Approx.) LOOKING 85 DOWNSTREAM 80 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 Station (ft.) = ® = m ® = ® ® = = = m = m = = = PRESSLEY-LINER PROFILE 105 - 85 O -Al N GJ -? Cn 0) ?I Oo C0 CD O CD CD O O O O O O -? N w .f? m C) O (D CD (D CD CD O CD CD CD CD CD CD CD CD CD CD C) C) O -?- existing proposed Ir 7 Lam' TECHNICAL SPECIFICATIONS t s r TECHNICAL SPECIFICATIONS FOR STREAM REPAIRS & BANK STABILIZATION PROJECTS JULY, 2005 Prepared for: Haywood County, NC l.?``Q J??? CA `l no l"00aa 05 W SEAL 24993 s ? an a ? D, C `?ttttsess?sasssst 1 J u ?I TECHNICAL SPECIFICATIONS TABLE OF CONTENTS TITLE PAGE TABLE OF CONTENTS SECTION 1 - GENERAL REQUIREMENTS 1.1 SECTION INCLUDES 1 1.2 SUMMARY OF WORK 1 1.3 WORKFORCE EXPERIENCE 1 1.4 SPECIFIC EQUIPMENT REQUIREMENTS 1 1.5 MEASUREMENT AND PAYMENT 1 SECTION 2 - TEMPORARY FACILITIES 1 2.1 SECTION INCLUDES 1 2.2 MEASUREMENT AND PAYMENT 1 2.3 TEMPORARY SANITARY FACILITIES 1 2.4 BARRIERS 1 2.5 TRAFFIC CONTROL 1 2.6 STAGING AREA 1 2.7 COORDINATION WITH OWNER AND OTHER CONTRACTORS 2 2.8 PROTECTION OF EXISTING FACILITIES, STRUCTURES, AND SERVICES. 2 2.9 PROTECTION OF INSTALLED WORK 2 2.10 PROGRESS CLEANING & WASTE REMOVAL 2 2.11 EROSION CONTROL 2 2.12 FINAL CLEANING 2 SECTION 3 - QUALITY CONTROL 3 3.1 SECTION INCLUDES 3 3.2 MEASUREMENT AND PAYMENT 3 3.3 REFERENCES 3 3.4 CONSTRUCTION OBSERVATION 3 3.5 PLANTING OBSERVATION 3 SECTION 4 - SITE PREPARATION 4 4.1 SECTION INCLUDES 4 4.2 MEASUREMENT AND PAYMENT 4 4.3 UTILITY LOCATION AND PROTECTION 4 4.4 SEDIMENTATION AND EROSION CONTROL 4 4.5 CONSTRUCTION LAYOUT 4 4.6 CLEARING, GRUBBING, AND STRIPPING 4 4.7 DEWATERING 4 SECTION 5 - EXCAVATION 5 5.1 SECTION INCLUDES 5 5.2 MEASUREMENT AND PAYMENT 5 5.3 REFERENCES 5 5.4 PREPARATION 5 5.5 EXCAVATING 5 5.6 PLANTING PREPARATION 5 5.7 TOLERANCES 5 SECTION 6 - FILLING, BACKFILLING AND COMPACTION 6 6.1 SECTION INCLUDES 6 6.2 MEASUREMENT AND PAYMENT 6 6.3 REFERENCES 6 6.4 FILL MATERIALS 6.5 PREPARATION 6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION 6.7 COMPACTION AND QUALITY CONTROL 6.8 PROTECTION OF FINISHED WORK 6.9 TOLERANCES SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN- STREAM STRUCTURES 7.1 SECTION INCLUDES 7.2 MEASUREMENT AND PAYMENT 7.3 REFERENCES 7.4 GENERAL 7.5 MATERIALS 7.6 IN-STREAM STRUCTURES & TOE STABILIZATION 7.7 CHANNEL PROTECTIVE LININGS 7.8 SLOPE PROTECTION SECTION 8 - STREAM BANK PLANTING 8.1 SECTION INCLUDES 8.2 MEASUREMENT AND PAYMENT 8.3 REFERENCES 8.4 GENERAL 8.5 LIVE STAKES 8.6 PLANT SUBSTITUTION 8.7 PLANTING PREPARATION 8.8 STREAM BANK PLANTING 8.9 PLANTING PERIODS 8.10 REMOVAL OF NUISANCE VEGETATION 8.11 WATER FOR PLANTINGS 8.12 SUBMITTALS SECTION 9 - BUFFER PLANTING 9.1 SECTION INCLUDES 9.2 MEASUREMENT AND PAYMENT 9.3 REFERENCES 9.4 GENERAL 9.5 CONTAINER GROWN PLANTS 9.6 BARE ROOT PLANTS 9.7 PLANT SUBSTITUTION 9.8 PLANTING PREPARATION 9.9 PLANTING PERIODS 9.10 REMOVAL OF NUISANCE VEGETATION 9.11 WATER FOR PLANTINGS 9.12 SUBMITTALS SECTION 10 - PERMANENT SEEDING 10.1 SECTION INCLUDES 10.2 MEASUREMENT AND PAYMENT 10.3 REFERENCES 10.4 GENERAL '10.5 SEEDBED PREPARATION 10.6 SEEDING 10.7 SEEDING DATES I1 6 6 6 6 7 7 7 7 7 7 7 7 8 9 9 10 10 10 10 10 10 10 10 10 10 10 10 I1 II 11 11 11 12 12 12 12 12 12 12 12 13 13 13 13 13 13 13 13 10.8 SOIL AMENDMENTS 13 11.5 SILT FENCE 14 10.9 MULCH 13 11.6 TEMPORARY SEEDING 14 i SECTION I I - SEDIMENT & EROSION CONTROL 14 SECTION 12 - SITE MAINTENANCE 15 11.1 SECTION INCLUDES 14 12.1 SECTION INCLUDES 15 11.2 MEASUREMENT AND PAYMENT 14 12.2 MEASUREMENT AND PAYMENT 15 11.3 REFERENCES 14 12.3 EXECUTION 15 11.4 MATERIALS 14 n C' e iii SECTION 1 -GENERAL REQUIREMENTS SECTION 2 - TEMPORARY FACILITIES J J I r I n 1.1 SECTION INCLUDES General requirements and information related to the work including, summary of work, measurement and payment, and reference to SPECIAL CONTRACT PROVISIONS. 1.2 SUMMARY OF WORK The Haywood County Stream Repairs and Bank Stabilization project consists of the earthwork construction of repaired and stabilized channel banks, in-channel structure installation, toe stabilization, and/or planting of the repaired channel banks and surrounding buffer area. Refer to the Construction Drawings and to these Specifications for project details. 1.3 WORKFORCE EXPERIENCE The Contractor is required to have the appropriately experienced personnel on site to operate equipment and insure that the construction sequence and installation procedures are followed as determined by the Engineer. Contractor personnel should be familiar with stream repair and bank stabilization techniques and the correct method of installing in-stream structures (i.e. rock cross-vanes). 1.4 SPECIFIC EQUIPMENT REQUIREMENTS The Contractor is required to have at a minimum two excavators with hydraulic thumbs during the entire course of construction unless otherwise approved by the Engineer. The hydraulic excavators must be of sufficient size to lift, manipulate, and install boulders larger than 5- foot by 4-foot by 3-foot (a maximum of 6 tons). 1.5 MEASUREMENT AND PAYMENT All measurement and payment for services performed shall be as indicated in the SPECIAL CONTRACT PROVISIONS. As such, they are not defined in these technical Specifications. END OF SECTION Stream Repairs & Bank Stabilization Haywood County Stream Repairs Page 1 2.1 SECTION INCLUDES Required temporary facilities including site access, temporary sanitary facilities, barriers, traffic control, construction staging area, Contractor coordination, protection of existing facilities and installed work, erosion control measures, and general site cleaning. 2.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 2.3 TEMPORARY SANITARY FACILITIES Provide and maintain required sanitary facilities and enclosures. No permanent sanitary facilities exist at the project site. 2.4 BARRIERS Provide barriers to prevent unauthorized entry to construction areas, to allow for Owner and Engineer access to site, and to protect existing structures and adjacent properties from damage due to construction operations. 2.5 TRAFFIC CONTROL Provide traffic control as required to protect the public safety. Conform to all requirements of State, County, City, or local laws and requirements for traffic control. Conformance with Contract Documents does not relieve the Contractor from responsibility for public safety. Construction operations may be underway on adjoining portions of the site. 2.6 STAGING AREA The Owner will designate an area for staging of Contractor's equipment and construction materials for the duration of construction. This area shall be maintained so as to provide a sightly appearance and a safe working environment. No other area shall be used for this purpose without the approval of the Owner. Storage of oil or fuel shall be confined to the construction staging area. Refueling of all vehicles and equipment shall occur only in the staging area. Refueling of non-mobile equipment located outside of the staging area will be allowed with Owner approval. No refueling shall occur within fifty feet of the channel or any other surface water or wetland. The Contractor shall take appropriate measures to ensure safe fueling procedures are followed. Contractor shall provide appropriate spill prevention measures. The Contractor shall provide a spill containment plan for both the staging area and the construction area. The plan shall include prevention, containment, and control of fuel or oil spillage from equipment storage, refueling, maintenance, and operation on site. The plan shall address both mobile and non-mobile equipment used during construction. Emergency spill cleanup equipment for oil and fuel spills shall be stored on site. The Contractor shall notify the Owner and all applicable agencies within 24 hours of any spill. Technical Specifications July 2005 2.7 COORDINATION WITH OWNER AND OTHER 2.12 FINAL CLEANING CONTRACTORS t t 11 u I C Perform coordination with Owner and schedule work to ensure limited disruption of daily operations. Obtain approval from Owner prior to the disruption of any access to site utilities, structures, or locations. Coordinate the disruption of any utility services without regard to duration. Provide continuous representation/point of contact for Owner during all site activities. Access to construction site shall be limited to the entrance designated on the plans. Only access points approved by the Owner shall be used during construction. 2.8 PROTECTION OF EXISTING FACILITIES, STRUCTURES, AND SERVICES The project vicinity, including existing access routes, will continue to be used for daily operations by Owner and other contractors throughout the duration of the construction. The Contractor shall protect existing facilities, structures, and services throughout the duration of construction and provide special protection where specified in individual specification sections. Provide temporary and removable protection for existing structures and services. Control activity in immediate vicinity of facilities, structures, and services to prevent damage. Any facility, structure, or services disturbed or damaged, either intentionally or unintentionally, shall be removed and reinstalled or repaired to the Owner's satisfaction. Repairs to or replacement of facilities, structures, or services shall be performed at the expense of the Contractor. Repairs and/or replacement shall occur without additional cost to the Owner. 2.9 PROTECTION OF INSTALLED WORK Protect installed work and provide special protection where specified in individual specification sections. Provide temporary and removable protection for installed work and products. Control activity in immediate work area to prevent damage. Any installed work disturbed or damaged, shall be removed and reinstalled or repaired to the Engineer's satisfaction. Repairs to or replacement of installed work shall be performed at the expense of the Contractor. Repairs and replacement shall occur without additional cost to the Owner. 2.10 PROGRESS CLEANING AND WASTE REMOVAL Maintain areas free of waste materials, debris, and rubbish. Maintain site in a clean and orderly condition. Collect and remove waste materials, debris, and rubbish from site daily and dispose off site. Remove temporary utilities, equipment, facilities, and materials prior to Final Application for Payment inspection. Restore existing facilities used during construction to original condition. 2.11 EROSION CONTROL Contractor shall be responsible for preventing erosion on the site and sedimentation off the site. Methods shall be employed as recommended in the North Carolina Erosion and Sediment Control Planning and Design Manual, latest edition. Stream Repairs R. Bank Stabilization Page 2 Haywood County Stream Repairs 1 Execute final cleaning prior to final project assessment. Clean site and all installed work. Remove waste and surplus construction materials, rubbish, and construction facilities from the site. END OF SECTION Technical Specifications July 2005 I SECTION 3 - QUALITY CONTROL Section 9 (Wetland and Buffer Planting) of these Specifications. ?1 iJ 11 3.1 SECTION INCLUDES Observation of construction operations and buffer and stream bank planting. 3.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS. Unless indicated otherwise, the Owner will arrange and pay for initial planting observation for quality assurance. Re-observation testing required because of non-conformance to plans or Specifications shall be charged against any money owed to Contractor. Contractor is encouraged to perform quality control checks and testing at Contractor's expense to reduce the possibility of rejected work. 3.3 REFERENCES For products or workmanship specified by association, trade, or other consensus, comply with requirements of the standard, except when more rigid requirements are specified or are required by applicable codes. Conform to reference standard by date of issue on date of Contract Documents, except where a specific date is established by code. Section 6 (Filling, Backfilling, and Compaction) of these Specifications. Section 8 (Stream Bank Planting) of these Specifications. 3.4 CONSTRUCTION OBSERVATION The Owner has engaged the Engineer to observe construction operations as required in these Specifications. Reports (either verbal or written) shall be submitted concurrently to the Owner and Contractor, indicating observations and indicating compliance or non-compliance with Contract Documents. Observation of construction operations does not relieve Contractor of obligation to perform work to contract requirements. The Contractor shall allow observation personnel access to materials and the construction site as required. 3.5 PLANTING OBSERVATION The Owner has engaged the Engineer to observe stream bank and buffer planting as required in these Specifications. Reports will be submitted concurrently to the Owner and Contractor, indicating observations and indicating compliance or non-compliance with Contract Documents. Observation of planting operations does not relieve Contractor of obligation to perform work to contract requirements. The Contractor shall allow observation personnel access to materials (see stream bank plantings specified in Section 8) and the construction site as required. END OF SECTION Stream Repairs & Bank Stabilization Haywood County Stream Repairs Page 3 Technical Specifications July 2005 u w 'L? l J 7 t SECTION 4 - SITE PREPARATION 4.1 SECTION INCLUDES Site preparation shall consist of utility location and protection, clearing, grubbing and stripping of the work area, and construction of any required temporary construction access routes and temporary sediment and erosion control measures. 4.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 4.3 UTILITY LOCATION AND PROTECTION The Contractor shall locate all existing utilities and mark them for identification. Contractor shall provide means for protecting utilities from any damage during site work. Repair of damaged utilities shall be at the Contractor's expense. Coordination should be made with Owner to locate and mark site specific utilities. NC ONE CALL (1-800-632- 4949) 4.4 SEDIMENTATION AND EROSION CONTROL Contractor shall be responsible for preventing erosion on the site and sedimentation off the site. Methods shall be employed as recommended in the North Carolina Erosion and Sediment Control Planning and Design Manual, latest edition. The Contractor shall control sedimentation runoff with methods approved by the Engineer during the course of construction of this Project. Depending on the magnitude of the clearing and grubbing associated with the project, an Erosion Control Plan may be required Temporary erosion and sediment control measures shall be installed as described in Section 1 I (Sediment & Erosion Control). The Contractor shall conform to all the rules, regulations, laws, and ordinances of the State of North Carolina, and of all other authorities having jurisdiction. 4.5 CONSTRUCTION LAYOUT The construction layout may include, but will not necessarily be limited to, channel disturbance limits, earthwork limits, and appropriate grading values. The Contractor is responsible for the construction surveying and layout. The Contractor is required to have a laser level or other equivalent equipment available on site during the entire period of construction. 4.6 CLEARING, GRUBBING, AND STRIPPING Conform to applicable codes for environmental requirements, disposal of debris, and erosion and sedimentation control as described above. Coordinate clearing work with utility owners and operators as described above. Establish a schedule for daily removal of debris from the site. Debris may not be stockpiled on site. Clear areas required for access to site and execution of work. Remove trees, stumps, other wood, metal, or rubble debris within work areas. In areas where bank repairs will be implemented, the existing top six inches of soil should be removed and stockpiled prior to excavation, construction, or reconstruction efforts. 4.7 DEWATERING Comply with all rules, regulations, laws, and ordinances of the State of North Carolina, and of all other authorities having jurisdiction. Provide, without additional cost to the Owner, all labor, materials, equipment, and services necessary to make the work comply with such requirements. Install all barriers, erosion and sedimentation control devices, silt fences, and other measures as required to prevent off-site sedimentation. Grade and ditch the site as necessary to direct surface runoff away from open excavations and subgrade surfaces. All water drained from the Work shall be disposed of in a manner that will not result in undue interference with other work or damage adjacent properties, other surfaces, structures, and utilities. All water due to the dewatering operation shall be legally disposed of in accordance with all applicable State and federal regulations and other applicable regulations. Under no circumstances shall fill be placed in excavations containing standing water without approval of the Engineer. END OF SECTION Remove stumps, main root ball, and all roots with a diameter greater ' than 2 inches. Leave area in a clean and neat condition. Grade site surface daily to control the direction of channelized flow and prevent free standing surface water. 11 Stream Repairs and Bank Stabilization Page 4 Technical Specifications ' Haywood County Stream Repairs July 2005 SECTION 5 - EXCAVATION 5.1 SECTION INCLUDES Provide all necessary equipment and labor to excavate for channel restoration without damage or interruption of utility service. 5.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 5.3 REFERENCES Occupational Safety and Health Administration - Construction Standards for Excavations, 29 CFR Part 1926.650-.652. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 5.4 PREPARATION Locate, identify, and protect utilities from damage as described in Section 4.3. Notify utility companies and coordinate for and/or install protection of utilities. 5.5 EXCAVATING Protect all utilities and structures that may be damaged by excavating work. In areas where stream and floodplain grading will be implemented, the existing top six inches of soil should be removed and stored prior to construction or reconstruction efforts. Perform Work in accordance with Occupational Safety and Health Administration (OSHA) - Construction Standards for Excavations, 29 CFR Part 1926.650-.652. Provide trench and excavation protection as required. Slope banks with machine to stable slope or flatter until shored. Grade top perimeter of excavation to prevent surface water from draining into excavation. Where required to protect utilities, perform excavation by hand. Remove subsoil, boulders, and rock as directed by the Engineer. Notify Engineer if subsurface conditions require excavation of larger subsoil, boulders, and rock, and discontinue Work. Engineer may direct adjustment in construction elevations. Adjustment of elevations shall not be a basis for additional payment. Correct areas over excavated in accordance with Section 6 (Filling, Backfilling, and Compaction) and as shown in the Construction Drawings. Stockpile select excavated material on-site for re-use in backfill. Stockpile location shall be subject to Owner approval. 5.6 PLANTING PREPARATION In areas where buffer planting will be implemented, the stockpiled topsoil and/or off-site topsoil (as required), should be distributed in preparation for restoration planting operations as described in SECTION 7 (Channel Protective Linings and In-stream Structures) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. All areas where topsoil is distributed shall be disked or harrowed to ensure soil aeration and to increase the surface roughness prior to planting. 5.7 TOLERANCES Top surface of channel protective lining (where applicable): Plus or minus one inch from required elevations. Top surface of fill, backfill, and topsoil: Plus or minus one inch from required elevations. END OF SECTION Stream Repairs and Bank Stabilization Page 5 Technical Specifications Haywood County Stream Repairs July 2005 SECTION 6 - FILLING, BACKFILLING AND COMPACTION 6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION 6.1 SECTION INCLUDES Provide all necessary equipment and labor to perform filling, backfilling, and compaction necessary for construction of repaired channel banks, and other site work as shown on the Drawings without damage or interruption of utility service. Backfill areas to contours and elevations with unfrozen materials. Do not backfill over porous, frozen, or spongy subgrade surfaces. Employ a placement method that does not disturb or damage other work. Make gradual grade changes. Blend slope into level areas. Place backfill and fill in loose level lifts not to exceed six inches in thickness before compaction. Make gradual grade changes. Blend slope into level areas. D I Replacement of removed topsoil shall be as described in SECTION 5.6 (Planting Preparation) of these Specifications. 6.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 6.3 REFERENCES ASTM D698 - Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures, Using 5.5 lb. Rammer and 12-inch Drop. ASTM D1556 - Test Method for Density of Soil in Place by the Sand-Cone Method. ASTM D2922 - Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth). ASTM D3017 - Test Methods for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth). ASTM D2487 - Classification of Soils for Engineering Purposes. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 6.4 FILL MATERIALS Soil excavated during construction and stockpiled may be re-used as fill provided that it can be conditioned and compacted as specified. Supplement or replace excavated soils with channel bed material or ordinary fill as shown on the Drawings and as needed to complete work. Fill for Lower-Bank Zone shall consist of channel bed material from an approved borrow source. Ordinary fill for Mid-Bank and Upper-Bank Zones shall be any soil classified as SM, SC, SP-SM, SP- SC, SC-SM, SP, or SW under ASTM D2487 unless otherwise directed by the Engineer. If soil excavated during cut operations is not re-used, it shall be removed from the site to an appropriate disposal facility at no additional charge to Owner. The Contractor shall be responsible for the payment of all fees associated with transportation and disposal of unusable materials. Suitable borrow material may be available within the vicinity of the project site but must be identified by the Contractor and approved by the Engineer. 6.5 PREPARATION Compact subgrade to density requirements for subsequent backfill materials. Cut out soft areas of subgrade not capable of compaction in place. Backfill with ordinary fill material and compact to density equal to or greater than requirements for subsequent fill material. Earth fill in repaired channel banks and other structures shall be placed so as to meet the following additional requirements: a. The distribution of materials throughout each zone shall be essentially uniform and the fill shall be free from lenses, pockets, streaks, or layers of material differing substantially in texture or gradation from the surrounding materials. b. Backfill areas to contours and elevations with unfrozen materials. Do not backfill over porous, frozen, or spongy subgrade surfaces. Employ a placement method that does not disturb or damage other work. Place backfill and fill in loose level lifts not to exceed six inches in thickness before compaction. Make gradual grade changes. Blend slope into level areas. c. If the surface of any layer becomes too hard and smooth for proper bond with the succeeding layer, it shall be scarified parallel to the axis of the fill to a depth of not less than 2 inches before the next layer is placed. d. The top surfaces of embankments shall be maintained approximately level during construction, except that a crown or cross-slope of not less than 2% shall be maintained to insure effective drainage, and except as otherwise specified for drain fill zones. e. Repaired channel banks shall be constructed so that the slope of the bonding surfaces between embankment in place and embankment to be placed is not steeper than 2 feet horizontal to 1 foot vertical, unless otherwise specified on the Contract Drawings. New embankment material shall be benched into existing slope as shown on the plans. Short bench levels shall be formed to a slope of 2H:1 V or flatter, based on existing slope conditions as determined by the Engineer at the time of construction, unless otherwise specified on the Contract Drawings. Benching shall be constructed in such a fashion as to inhibit the formation of preferential planes of slope failure. The bonding surface of the embankment in place shall be stripped of all loose material, and shall be scarified, moistened and recompacted when the new fill is placed against it as needed to insure a good bond with the new fill and to obtain the specified moisture content and density in the junction of the in-place and new fill. Any variation to this method of tying new fill into the existing filled bank shall be determined in the field at time of construction by the Engineer. 6.7 COMPACTION AND QUALITY CONTROL For backfill operations, compaction shall be performed using tracked equipment as directed by the Engineer. Compaction greater than that provided by tracked equipment may be deemed necessary by the Engineer based on site or soil conditions. Provide compaction as directed by the Engineer. Lift thickness shall not exceed 6". Stream Repairs and Bank Stabilization Page 6 Technical Specifications Haywood County Stream Repairs July 2005 u u El U i 6.8 PROTECTION OF FINISHED WORK Protect finished work. Reshape and re-compact fills subjected to vehicular traffic or damaged by erosion. 6.9 TOLERANCES Top surface of channel protection lining (where applicable): Plus or minus one inch from required elevations. Top surface of fill, backfill, and topsoil: Plus or minus one inch from required elevations. Top surface of floodplain (where applicable): Plus or minus one inch from required elevations. END OF SECTION SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN- STREAM STRUCTURES 7.1 SECTION INCLUDES Temporary and permanent channel erosion protective linings and in- stream rock and log structures. 7.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 7.3 REFERENCES The following specifications and methods form a part of this Specification: ASTM C88 - Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate ASTM C 127 - Standard Test Method for Specific Gravity and Absorption of Coarse Aggregate NCDOT - Standard Specifications for Roads and Structures. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 7.4 GENERAL A Channel Protective Lining has been selected along channel banks. In-stream Structures will be installed to provide additional bank protection where shown on the Drawings. Materials to be used in Channel Protective Linings and the In-Stream Structures are specified in this section. Channel erosion protection linings shall be constructed of the materials specified in this section and as shown on the Drawings. Linings shall be laid true to the grade shown on the Drawings. Linings shall make a smooth interface with the surrounding grade. Any portion of the lining which has its grade or surface disturbed after placement shall be repaired. Any portion thereof already in place which is found to be defective or damaged shall be repaired or replaced, as directed by the Engineer, without additional cost to the Owner. The in-stream structures shall be constructed of the materials specified in this section and as shown on the Drawings. Any portion of the structure which is disturbed after placement shall be repaired. Any portion of the structure found to be defective or damaged shall the repaired or replaced, and directed by the Engineer, without additional cost to the Owner. 7.5 MATERIALS Materials include excelsior and coir fiber matting manufactured especially for erosion control, Eco-Stakes, wire staples, nonwoven geotextile, boulders, channel bed material, NCDOT Coarse Aggregate Size #57, NCDOT Class A Erosion Control Stone, NCDOT Class B Erosion Control Stone, NCDOT Class I Rip Rap (RipRop), and NCDOT Class 2 Rip Rap (RipRap). Matting for erosion control in areas other than stream banks with mild slopes shall be excelsior matting. Excelsior matting shall consist of a machine produced mat of curled wood excelsior that is a minimum of Stream Repairs and Bank Stabilization Page 7 Technical Specifications Haywood County Stream Repairs July 2005 47 inches in width. The mat shall weigh 0.975 pounds per square yard with a tolerance of plus or minus 10 percent. At least 80 percent of the individual excelsior fibers shall be 6 inches or more in length. The excelsior fibers shall be evenly distributed over the entire area of the blanket. One side of the excelsior matting shall be covered with an extruded plastic mesh. The mesh size for the plastic shall be a maximum of V x I" square. Matting for erosion control shall not be dyed, bleached, or otherwise treated in a manner that will result in toxicity to vegetation: Other acceptable material manufactured especially for erosion control may be used when approved by the Engineer in writing before being used. Erosion control matting for stream banks shall be CF 7 coir matting. Matting shall be 100% coir fiber. Minimum Specifications for coir matting as follows: Weight Thickness Water Velocity Grab/Elongation (Dry) Manning's n Max Shear Stress 20.6 oz/yd2 (700 g/m2) ASTM-D3776 6.34 mm 10 ft/s 115.81bs/23.9% MD ASTM-D4594 54.1 Ibs/33.5% XD 0.0294 4.46 Ib/ft2 Nonwoven Geotextile: Geotextile shall be a nonwoven fabric with a minimum weight of 12 ounces per square yard (ASTM D3776), a minimum grab strength in either direction of 180 pounds (ASTM D4632), a minimum puncture resistance of (ASTM D4833) of 85 pounds, and permeability of (ASTM D4491) greater than 0.2 cm/sec. Fabric meeting these Specifications shall still be subject to approval or rejection by the Engineer. At the time of installation, the fabric will be rejected if it has defects, rips, holes, flaws, deterioration, or damage incurred during the manufacture, transportation, or storage. NCDOT Coarse Aggregate Size #57: Shall conform to gradation requirements of Table 1005-1, NCDOT Specifications. NCDOT Class A Erosion Control Stone: 2 to 6-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards (No more than 5% of the material furnished can be less than the minimum size specified, nor more than 10% of the material can exceed the maximum size specified). Concrete rubble shall not be used. NCDOT Class B Erosion Control Stone: 5 to 12-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards (No more than 5% of the material furnished can be less than the minimum size specified, nor more than 10% of the material can exceed the maximum size specified). Concrete rubble shall not be used. NCDOT Class 1 Rip Rap (RipRap): 5 to 17-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards. The stone shall vary in weight from 5 to 200 pounds with 30% weighing a minimum of 60 pounds each and 10% weighing a minimum of 15 pounds each. (No more than 5% of the material furnished can be less than the minimum size specified, nor can more than 10% of the material exceed the maximum size specified). The rock fragments shall be angular to subrounded in shape. Concrete rubble shall not be used. NCDOT Class 2 Rip Rap (RipRap): 9 to 23-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards. The stone shall vary in weight from 25 to 250 pounds and 60% shall weigh a minimum of 100 pounds each. (No more than 5% of the material famished can be less than the minimum size specified, nor can more than 10% of the material exceed the maximum size specified). The rock fragments shall be angular to subrounded in shape. Concrete rubble shall not be used. Boulders (Toe Stabilization and Footer Rocks): Boulders of approximate dimension 6' x 3' x 2' shall be individually picked by Contractor from the quarry or the on site stockpile for use in in-stream structure construction. Boulders as small as 4' x 2' x 2' may be used; however, they shall not constitute more than 30% of the total boulders. Boulders shall be relatively flat on either side in the same dimension, preferably the long dimension and must have smooth ends. 7.6 IN-STREAM STRUCTURES & TOE STABILIZATION The work covered by this section consists of the construction of in- stream structures including rock vane arms, J-hooks, cross-vane structures, and rock toe stabilization. The quantity of in-stream structures and length of toe stabilization to be constructed will be affected by actual conditions that occur during the construction of the project. The type and quantity of structures may be increased or decreased at the direction of the Engineer. Such variations in quantity will not be considered as alterations in the details of construction or a change of character of the work. A tracked hydraulic excavator with a thumb of sufficient size to move specified boulders is required for this item. Precise placement of structures will be determined during construction by the Engineer and may not reflect the construction Drawings. In-stream structures and toe stabilization installed must be inspected and approved by the Engineer. Excavation for the purpose of installation is incidental and is covered by this line item. The excavation of the subgrade and installation will be consecutive and continuous. Once the installation procedure has been initiated, it will be completed before the end of the workday. Any incidental/accidental discharge of sediment accumulation as a result of the installation procedure will be removed or integrated into the designed bedform. Excavation shall terminate at bedrock if contacted prior to the design grade. Bedrock will be excavated only if it is determined to. be rippable and necessary by the Engineer. Install toe stabilization as shown on the Drawings and and as directed by the Engineer. Grade area where toe stabilization is to be constructed. Surface shall be free of obstructions, debris, and pockets of soft or low density material. Unless otherwise directed by the Engineer, the stone shall be placed on the slope and/or angle as indicated on the plans. The stone shall be graded so that the smaller stones are uniformly distributed throughout the mass. The Contractor may place the stone by mechanical methods provided that when the work is completed, it forms a properly graded, dense, neat layer of stone. Place rock vane arms as shown on the Drawings. Footer rocks shall be installed to define shape of in-stream rock structures. Footer rocks shall be installed such that their long dimension is oriented in the direction of flow. No gaps shall be left between footer rocks. Minimum footer rock depth below the proposed ground surface of the stream bed shall be 4 feet. Rock sills shall extend a minimum of 3 feet beyond bankfull (perpendicular to stream flow) as indicated on plans. Stream Repairs and Bank Stabilization Page 8 Technical Specifications ' Haywood County Stream Repairs July 2005 Geotextile shall be placed over structures and backfilled with aggregate inches with the upper matting overlapping the lower matting. Vertical as shown on plans. overlaps in matting shall be a minimum of 12 inches. 7.7 CHANNEL PROTECTIVE LININGS Grade the area to be lined. Surface shall be free of obstructions, debris, and pockets of soft or low density material. The rock weir structures shall be completed prior to installation of the channel protective linings. Cover area with all available on-site stockpiled topsoil to a preferred minimum depth of 4 inches. Final grade with topsoil shall be as shown on Drawings. Topsoil shall be prepared with fertilizer and lime, and seeded as described in Section 10 (Permanent Seeding) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. Install CF-7 erosion control matting perpendicular to the axis of the stream. The matting shall be laid smooth and free from tension, stress, folds, wrinkles and creases. Horizontal overlaps shall be a minimum of 12 inches with the upper matting overlapping the lower matting. Vertical overlaps in matting shall be a minimum of 12 inches with the upstream matting overlapping the downstream matting. The top (crest) and bottom (toe) edges of the matting shall be anchored in trench at least 12 inches deep as shown on Drawings to prevent undercutting of the matting. Matting trench and wire staples shall be constructed and installed as shown on Drawings. Wire staples shall be installed not more than 3 feet apart (3' on centers) and staggered, with a minimum of 3 stakes per square yard of matting over the entire lined area. Staples shall be driven perpendicular to the soil surface. Staples shall be driven flush with soil surface to reduce potential for movement of the erosion control matting. Staples shall be installed in parallel rows on 3' centers and in trenches at the top and bottom of the slope as shown on Drawings. Along all laps (both vertical and horizontal) in the matting, install a common row of staples at the seam, installing staples on 1 foot (12 inch) centers. All standard anchoring staples shall be 18 inches in length. Staples shall be driven in with a wooden mallet. Care shall be taken to avoid damage to matting material. In the event that the matting is displaced or damaged during installation, the matting shall be repositioned or replaced. This will be done at no additional cost to the Owner. END OF SECTION t e t I The top (crest) edge of the matting shall be anchored in trench at least 12 inches deep as shown on plans to prevent undercutting of the matting. The trench should be located a minimum of 12 inches from the top of bank, and shall not alter channel or floodplain grade. Matting trench and Eco-StakeS(D shall be installed as shown on Drawings. Matting shall be anchored utilizing Eco-stakeO brand stakes installed not more than 3 feet apart (3' on centers) and staggered, with a minimum of 3 stakes per square yard of matting over the entire lined area. 24-inch Eco-stakesi) shall be used along the toe of the channel and 12-inch stakes shall be used within the field and top edge of the matting as detailed on the Construction Drawings. Along all laps (both vertical and horizontal) in the matting, install a common row of staples at the seam, installing staples on 1 foot (12 inch) centers. Along the toe, 24 inch Eco-StakesV shall be spaced not more than 2 feet All stakes shall be driven perpendicular to the axis of the stream as shown on Drawings. Care shall be taken to avoid damage to matting material. In the event that the matting is displaced or damaged during installation, the matting shall be repositioned or replaced. This will be done at no additional cost to the Owner. 7.8 SLOPE PROTECTION Grade area to be lined. Surface shall be free of obstructions, debris, and pockets of soft or low density material. Cover area with all available on-site stockpiled topsoil to a preferred minimum depth of 4 inches. Final grade with topsoil shall be as shown on Drawings. Topsoil shall be prepared with fertilizer and lime, and seeded as described in Section 10 (Permanent Seeding) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. Install excelsior matting perpendicular to slope. Matting shall be unrolled with netting material on top and blanket material in contact with the soil. (Note: some excelsior matting has netting on both sides.) The matting shall be laid smooth and free from tension, stress, folds, wrinkles and creases. Horizontal overlaps shall be a minimum of 12 Stream Repairs and Bank Stabilization Page 9 Technical Specifications ' Haywood County Stream Repairs July 2005 SECTION 8 - STREAM BANK PLANTING and handled in a manner that will prevent injury, drying out, or freezing. 8.1 SECTION INCLUDES Provide all necessary equipment and labor to implement stream bank planting plan. 8.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 8.3 REFERENCES The following specifications and methods form a part of this Specification: NCDOT - Standard Specifications for Roads and Structures. 15 NCAC 213.200 - Classification of Water Quality Standards Applicable to Surface Waters & Wetlands of North Carolina The Baily Hortorium (1976 MacMillan Publishing Co., Inc.) American Standard for Nursery Stock, latest edition NCDENR - Erosion and Sediment Control Planning and Design Manual When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 8.4 GENERAL All plants shall be as called for by these Specifications and shown on the Drawings. Botanical names referred to in the Drawings are taken from "Hortus Third", the Baily Hortorium (1976 MacMillan Publishing Co., Inc.). All plants delivered shall be true to name. Each plant, or group of the same species, variety, and size of plant, shall be legibly tagged with the name and size of the plant. 8.6 PLANT SUBSTITUTION No change in the specified plants (species, variety, size, caliper, furnish, etc.) will be made without written approval of the Engineer. All requests by the Contractor for substitutions shall be presented in writing and shall include a listing of the sources which have been contacted in an attempt to secure the specified plant material. Requests for substitutions shall include botanical name, common name, size, caliper, and furnish description of the proposed substitute. No increase in compensation will be made to the Contractor as a result of the use of the approved substitute plants. 8.7 PLANTING PREPARATION In areas where stream restoration will be implemented, preparation for restoration planting operations shall be as described in SECTION 7 (Channel Protective Linings) of these Specifications. Where live stakes shall be planted, through the Channel Protective Lining, holes shall be made by neatly punching a hole in the matting with a dibble bar (a heavy metal tool with a blade and a foot petal). The dimensions of the hole shall not exceed 3" in any direction and shall not damage the surrounding matting. 8.8 STREAM BANK PLANTING Where live stakes shall be planted, they shall be installed at a 45 to 60 degree angle in the direction of stream flow. The buds of stakes and plant cuttings should point upward and about 2 inches of wood should be exposed above the ground surface. Tamp the surrounding soil firmly to eliminate air pockets. Where stream bank planting is directed, areas shall be planted with trees and shrubs, randomly intermixed with a 50:50 split, using 6-foot by 6-foot centers as shown on the Construction Drawings. All plants shall be first-class representatives of their species. Stakes shall be reasonably straight. All plants shall be free from plant diseases and insect pests. All shipments of plants shall comply with all nursery inspection and plant quarantine regulations of the States of origin and destination, as well as with Federal regulations governing interstate movement of stock. If stock from other States is used, the stock shall be accompanied by a tag or certificate stating, in effect, that the stock has been inspected and certified by an authorized official of the State of origin as apparently free from injurious plant pests. All plants shall be subject to inspection at any time by the Engineer Any such inspection before or during planting operations, however shall not. be construed as final acceptance of the plants involved. 8.5 LIVE STAKES Live stakes, if approved for use by the Engineer, shall consist of freshly cut live plants of select stock which has been developed by proper cultural treatment. Stakes and cuttings shall be 3/8" to 1/2" diameter and between 12 and 18 inches long. They shall be carefully cut from mother-stock plantings. Plant materials shall be packaged, transported, Care should be taken to avoid planting stakes too deep or too shallow, and to avoid damage to stakes during planting. Planting depth should be in accordance with listed references and supplier recommendations. 8.9 PLANTING PERIODS The installation of live stakes, bare root, or container grown plants shall be performed between October 1 and November 15, 2005. However, planting can not begin until all stream repairs have been completed. 8.10 REMOVAL OF NUISANCE VEGETATION Removal or control of nuisance vegetation shall be performed for a period of 90 days as necessary to ensure adequate survival of specified plant species. See SPECIAL CONTRACT PROVISIONS. 8.11 WATER FOR PLANTINGS The Contractor shall install a rain gage and collect daily gage readings at the site. Contractor shall provide initial watering on the day of planting and thereafter at a minimum rate of I inch per week (including rainfall) for a period of 90 days. Water used in the planting or care of Stream Repairs and Bank Stabilization Page 10 Technical Specifications ' Haywood County Stream Repairs July 2005 i n F, C a D C 1 r El G U t n vegetation and plantings shall meet the requirements of Class C fresh waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT PROVISIONS. 8.12 SUBMITTALS Contractor shall submit purchase certificates (or other proof) of all species planted. END OF SECTION SECTION 9 - BUFFER PLANTING 9.1 SECTION INCLUDES Provide all necessary equipment and labor to implement buffer planting plan. 9.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 9.3 REFERENCES The Baily Hortorium (1976 MacMillan Publishing Co., Inc.) American Standard for Nursery Stock, latest edition NCDENR - Erosion and Sediment Control Planning and Design Manual 15 NCAC 213.200 - Classification of Water Quality Standards Applicable to Surface Waters & Wetlands of North Carolina The following specifications and methods form a part of this Specification: NCDOT - Standard Specifications for Roads and Structures. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 9.4 GENERAL All plants shall be as called for by these Specifications. Bare rooted plants may be used in lieu of container grown plants provided written approval for such use has been obtained from the Engineer. Grading of plants, type and minimum dimensions of containers shall conform to the Specifications contained in the latest edition of American Standard for Nursery Stock. Plants shall not be cut back from larger sizes to meet sizes called for on the Drawings. Botanical names referred to in the Drawings are taken from "Hortus Third", the Baily Hortorium (1976 MacMillan Publishing Co., Inc.). All plants delivered shall be true to name. Each plant, or group of the same species, variety, and size of plant, shall be legibly tagged with the name and size of the plant. All plants shall be first-class representatives of their species. The root system shall be vigorous and well-developed. The branch systems shall be of normal development, and free from disfiguring knots, sun scald injuries, abrasions of the bark, dead or dry wood, broken terminal growth, or other objectionable disfigurements. Trees shall have reasonably straight stems, and shall be well branched and symmetrical in accordance with their natural habits of growth. All plants shall be free from plant diseases and insect pests. All shipments of plants shall comply with all nursery inspection and plant quarantine regulations of the States of origin and destination, as well as with Federal regulations governing interstate movement of nursery stock. If nursery stock from other States is used, the stock shall be accompanied by a tag or certificate stating, in effect, that the nursery stock has been inspected and certified by an authorized official of the State of origin as apparently free from injurious plant pests. All plants shall be subject to inspection at any time by the Owner, Stream Repairs and Bank Stabilization Page I I Technical Specifications Haywood County Stream Repairs July 2005 I 7 [1 E 7 J 1 Engineer, or a party to be named by the Owner. Any such inspection before or during planting operations, however shall not be construed as final acceptance of the plants involved. 9.5 CONTAINER GROWN PLANTS Container grown plants shall be healthy, vigorous, well-rooted, and shall have become established in the container in which they are delivered. These plants shall have been in the established container long enough for the fibrous roots to have developed so that the root mass will retain its shape and hold together when removed from the container. The container shall be a 1 gallon container or larger, sufficiently rigid to firmly hold the soil protecting the root during transporting, handling, and planting, and the soil shall not be allowed to become frozen. 9.6 BARE ROOT PLANTS Bare root plants, if approved for use by the Engineer, shall have a heavy fibrous root system which has been developed by proper cultural treatment. They shall be dug, packaged, transported, and handled in a manner that will prevent injury to or drying out of the trunks, branches, or roots, or freezing of the roots. 9.7 PLANT SUBSTITUTION No change in the specified plants (species, variety, size, caliper, furnish, etc.) will be made without written approval of the Engineer. All requests by the Contractor for substitutions shall be presented in writing and shall include a listing of the sources which have been contacted in an attempt to secure the specified plant material. Requests for substitutions shall include botanical name, common name, size, caliper, and furnish description of the proposed substitute. No increase in compensation will be made to the Contractor as a result of the use of the approved substitute plants. 9.8 PLANTING PREPARATION In areas where wetland and buffer planting will be implemented, preparation for planting operations shall be as described in SECTION 5.6 (Planting Preparation) of these Specifications. Where container grown plants will be planted, holes made in preparation for tree and shrub species planting shall be as shown on the Construction Drawings. Bare root plants and container-grown plants shall be planted in holes made by neatly punching a hole through slope protection matting and into existing grade with a dibble bar (a heavy metal tool with a blade and a foot petal). The dimensions of the hole shall not exceed 3" in any direction. 9.9 PLANTING PERIODS The installation of bare root and container grown plants shall be performed between October 1 and November 15, 2005. However, planting can not begin until all stream repairs have been completed. 9.10 REMOVAL OF NUISANCE VEGETATION Removal or control of nuisance vegetation shall be performed for a period of 90 days as necessary to ensure adequate survival of specified plant species. See SPECIAL CONTRACT PROVISIONS. 9.11 WATER FOR PLANTINGS The Contractor shall install a rain gage and collect daily gage readings at the site. Contractor shall provide initial watering on the day of planting and thereafter at a minimum rate of 1" per week (including rainfall) for a period of 90 days. Water used in the planting or care of vegetation and plantings shall meet the requirements of Class C fresh waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT PROVISIONS. 9.12 SUBMITTALS Contractor shall submit purchase certificates (or other proof) of all species planted. END OF SECTION Stream Repairs and Bank Stabilization Page 12 Technical Specifications Haywood County Stream Repairs July 2005 SECTION 10 -PERMANENT SEEDING be used and erosion control matting shall be placed within 24 hours of seeding. Apply seeds and mulch at the rates indicated below. r 10.1 SECTION INCLUDES Permanent seeding for permanent site stabilization. 10.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 10.3 REFERENCES The following specifications and methods form a part of this Specification: NCDENR - Erosion and Sediment Control Planning and Design Manual When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 10.4 GENERAL Permanent seeding shall be executed in temporary lined areas and all other areas which are disturbed during construction activities. In areas where Channel Protective Lining will be installed, seedbed preparation and seeding shall be performed prior to the placement of erosion control matting (See SECTION 7 - Channel Protective Linings). Areas with Channel Protective Linings: Species Creeping Red Fescue (Festuca rubs ruba) Redtop (Agrostis stolonijera L.) Kentucky bluegrass (Poa pratensis L.) Rye (grain) Grass (Secale cereale) All other disturbed areas: Species Creeping Red Fescue (Festuca ruba rubs) Redtop (Agrostis stolonijera L.) Kentucky bluegrass (Poa pratensis L.) Rye (grain) Grass (Secale cereale) C 10.5 SEEDBED PREPARATION Complete grading before topsoiling or preparing seedbeds. Avoid creating steep slopes. Excess stockpiled topsoil not used in construction of Channel Protective Lining shall be redistributed across areas to be seeded. Where topsoil is unavailable, seedbeds may be prepared directly on the exposed finished grade or topsoil may be imported. Rate (lbs/acre) 80 15 15 15 Rate 0s/acre) 80 15 15 15 Mulch Rate (76.0000 sgft.) Grain Straw 70 10.7 SEEDING DATES Seeding dates given in these Seeding Specifications have the best probability of success. Best Possible Late winter 15 Feb-15 Mar 1 Dec-15 Mar Late Fall I Sept-30 Sept 1 Oct-30 Nov Seeding shall. be completed within the "possible" range of dates. 10.8 SOIL AMENDMENTS Apply lime and fertilizer according to soil tests, or apply 2 tons/acre (4,000 lb/acre) ground agricultural limestone and 1,000 lb/acre 5-10-10 fertilizer, or as directed by the Engineer. 10.9 MULCH If topsoil is used, it should be spread to a uniform depth of four to six inches and bonded to the subsoil by loosening with a disc, harrow, or chisel plow. Areas where seeding will occur on exposed finished grade shall be disked or harrowed to ensure soil aeration and to increase the surface roughness prior to planting. Apply lime and fertilizer evenly across seedbed and work into the top 4-6 inches of soil by discing or other suitable means. Operate machinery on the contour. I Rework the surface if soil becomes compacted or crusted prior to seeding. Complete seedbed preparation by breaking up large clods and Apply grain straw, or equivalent cover of another suitable mulching raking into a smooth, uniform surface. Fill in or level depressions that material as described above. Anchor mulch by roving or netting. Netting shall be used on slopes steeper than 2H:1 V. can collect water. 10.6 SEEDING Apply permanent seeding to seedbed after preparation is complete. Use certified seed for permanent seeding whenever possible. Certified seed is inspected by the North Carolina Crop Improvement Association. It ' meets published North Carolina Standards and should bear an official "Certified Seed" label. Broadcast seed into a freshly loosened seedbed that has not been settled by rainfall. Mulch must be used on slopes 4H: IV or steeper and in areas when concentrated water may flow. Anchor mulch with netting in areas subject to concentrated flow. In areas where Channel Protective Lining will be installed, no mulch shall Stream Repairs and Bank: Stabilization Page 13 ' Haywood County Stream Repairs END OF SECTION Technical Specifications July 2005 r L t SECTION 1 I - SEDIMENT & EROSION CONTROL 11.1 SECTION INCLUDES Installation of temporary sediment and erosion control measures to include installation of silt fence and temporary seeding measures. The Contractor shall maintain these measures to ensure proper structure function and vigorous temporary vegetative cover during construction. 11.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 11.3 REFERENCES The following specifications and methods form a part of this Specification: ASTM D4355 - Standard Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus) ASTM D4632 - Standard Test Method for Grab Breaking Load and Elongation of Geotextiles ASTM D4751 - Standard Test Method for Determining Apparent Opening Size of a Geotextile NCDENR - Erosion and Sediment Control Planning and Design Manual When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 11.4 MATERIALS Silt Fence: Silt fence shall have steel posts, woven wire fabric, and filter fabric. The steel post shall have a minimum length of 5' and minimum width of 1 3/4". The steel posts shall have projections for fastening the wire to the fence. The woven wire fabric shall be at lest 32 inches high, and shall have at least 6 horizontal wires. Vertical wires shall be spaced a maximum of 12 inches apart. The top and bottom wires shall be at least 10 gauge. All other wires shall be at least 12%i gauge. The silt fence filter fabric shall meet the following minimum criteria: If possible, the filter fabric shall be cut from a continuous roll to avoid the use of joints. When joints are necessary, securely fasten the filter cloth only at a support with overlap to the next post. Silt fences shall be inspected weekly and after each significant storm (1 inch in 24 hrs.). Any required repairs shall be made immediately. Sediment shall be removed when it reaches 1/3 the height of the fence or 9 inches maximum. Dispose of the sediment in the designated disposal area. 11.6 TEMPORARY SEEDING The Contractor shall provide all labor, materials, tools, and other items necessary to provide temporary seeding in accordance with State and local Standards. Areas where no substantial or significant progress is made for more than 15 days shall be temporarily seeded as shown on the Drawings and specified herein. All areas must be seeded, mulched, and anchored unless written approval is granted by the Owner. Incidental grading shall not constitute substantial or significant progress in construction activity. Seeding and mulching shall be done immediately following construction. All disturbed areas shall be dressed to a depth of 8 inches. The top 3 inches shall be pulverized to provide a uniform seedbed. Agricultural lime shall be applied at a rate of 2,000 pounds per acre immediately before plowing. Grass seed shall be applied at the following rate: Twe Dates Possible Rate Rye (Grain) Aug. 15 - May 1 60 lbs./ac. German Millet Mayl -Aug 15 40 lbs./ac. 10-10-10 fertilizer shall be applied to all disturbed areas at a rate of 750 pounds per acre, and mulching shall consist of small grain straw applied a rate of 70 pounds per 1000 square feet (70lbs./1000sq.ft.). Mulch shall be anchored by roving or netting. END OF SECTION Grab Tensile Strength 100 lbs. Grab Tensile Elongation 15 % UV Resistance 70% Apparent Opening Size (AOS) 20 (US Sieve) 11.5 SILT FENCE The Contractor shall provide all labor, materials, tools and other items necessary to furnish and install the silt fence as shown on the Drawings and specified herein. The silt fence shall be placed following the contours as closely as possible. The ends of the silt fence shall be turned uphill. The posts shall not exceed a spacing of 8 feet. The posts shall be driven into the ground and shall extend above ground as shown on the Drawings. The filter fabric shall be stapled or wired to each post. The filter fabric shall extend into the ground as shown in the Drawings. Stream Repairs and Bank Stabilization Page 14 Technical Specifications t Haywood County Stream Repairs July 2005 L t L C SECTION 12 - SITE MAINTENANCE 12.1 SECTION INCLUDES Site maintenance to ensure vigorous vegetative cover, stable channel lining, and durability of the work. 12.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 12.3 EXECUTION Contractor shall revisit the site as required in the special contract provisions to inspect the condition of the project site. Areas of erosion, settlement, poor vegetative cover, and displaced coir or excelsior materials or in-stream structures, shall be repaired. Site visits shall be coordinated with Owner. Erosion areas shall be filled and reseeded in accordance with Section 10 - Permanent Seeding. Areas of poor vegetative cover shall be reseeded and refertilized only. Displaced, damaged, or dead shrub species shall be removed, and replanted in accordance with Sections 8 & 9 - Stream Bank Planting and Buffer Planting. Displaced channel lining materials shall be recovered (if possible) and replaced, or replaced with new channel lining materials to the design line and grade. END OF SECTION w L Stream Repairs and Bank Stabilization Page 15 Technical Specifications ' Haywood County Stream Repairs July 2005 n DRAWINGS c 7 PRE55LEY-LINER 51TE _ i VICINITY MAP (NOT TO SCALE) ENGINEERING DE51GN FIRM: McGILL A550CIATE5 55 Broad 5treet Asheville, NC 28801 (828) 252-0575 ENVIRONMENTAL DE51GN FIRM: 501L ? ENVIRONMENTAL CON5ULTANT5, PA 1010 Raven Ridge Road Raleigh, NC 27G 14 (919) 84G-5900 PREPARED FOR: HAYWOOD COUNTY, NC COUNTY COURTHOUSE 215 N. MAIN STREET WAYNESVILLE, NC 28756 CONSTRUCTION DRAWINGS FOR: PRE55LEY-LINER SITE STI?EAM R E F A I I? BAN I\A"" STABILIZATION PLAN CONTENT5: HAYWOOD COUNTY, NC Q I , COVER, CONTENTS, ? VICINITY MAP Q2. 51TE MAPPING Q3. 51TE PHOTOGRAPII5 Q4. EX15TING 51TE CONDITION5 Q4A. EXISTING 51TE CONDITION5 (CONT'D) Q5. PROPOSED REPAIR PLAN Q5A. PROP05ED REPAIR PLAN (CONT'D) QG. CONSTRUCTION 5EQUENCE * PROPOSED STRUCTURE DETAIL5 Q7. TOE STABILIZATION DETAIL Q7A. TYPICAL REPAIR DETAIL Q8. ER0510N CONTROL DETAIL5 Q9. ER051ON CONTROL DETAIL5 II Q 10. PLANTING 5CHEDULE ? PLANTING DETAIL5 SEAL II ? ?? 24993 ?V ?? `11111111111\ uIc wz; 0 4', ?z ?Uz; oar ?u. z Qa; u wR z? nl? w V C/. C ? G w} a F- C Zoo 00 o0 0 3 Q a yi $q. O JFmY 0: m o?=az? _zozz F <VIDN= ,008 041 06 ui f- o. zQ W? z? 0Z 0? U >' 0 SHEET 0.1 I I 1 1 1 1 1 1 1 1 1 1 It A m ?t 2004 s COLOR INFRARED SCALE: 1 "= 200' (INFRARED PHOTO OBTAINED FROM NCDENR G.I.S. DEPARTMENT WEB SITE) 0 SITE MAPPING ViwI u-c wzf < E4z°s ?z Uz2 P 0<.7i rA 'F oP ?3 wF ZC t z o z ? At C ? I > Z Q 0 F ; O O 0 c 431 C 3 C "`ti "g=?NWS OJNmY W m r z ?p F< 1?1 O N U ?` ?y fit < U W < W CSCS' ON DUO c z z a_ ?? w a J Q JW 1999 :??'??? .? , ; W CD AERIAL PHOTOGRAPH / a SEAL o5 SCALE: 1200' i 24993 SHEET (AERIAL PHOTO OBTAINED FROM A, HAYWOOD COUNTY G.I.S. DEPARTMENT) Q2_ 1 1 u SITE PHOTOGRAPHS 7 C SEAL IV J • 24993 Y I aINE A, rrrrrnu11 ??? ?Wp uIc wz< Fzc ?z `IJz u Z a, ?aE ?0. z a ?w€ z? z` L0 9w, za o W O < Z ?n D 013 0 0 00 Q 2 C C r C C C c o " A? m www5 j pJz s: W W mpZ LI UJ p<pp ON E iFON0008? LW U) r T a w?a z0 D0 WO J = ?a NW W? D_ U) SHEET Q3 PRESSLEYILINER SITE PHOTO #1- DOWNSTREAM END OF REPAIR (LOOKING UPSTREAM). NOTE LARGE GRAVEL BARS TO RIGHT AND LEFT OF CHANNEL AND ERODED BANKS ON BOTH SIDES. PRESSLEYILINER SITE PHOTO #2 - DOWNSTREAM END OF REPAIR (LOOKING DOWNSTREAM) ALONG RIGHT BANK NEAR CUTOFF CHANNEL. (REPAIR RIGHT 2). PRESSLEYILINER SITE PHOTO #3 - MIDPOINT OF REPAIR REACH. (LOOKING UPSTREAM) FROM LEFT BANK PRESSLEYILINER SITE PHOTO #4 - UPSTREAM END OF REPAIR REACH. (LOOKING UPSTREAM) FROM LEFT BANK LEFT BANK REPAIR ENDS @ TREE LINE. RIGHT BANK REPAIR CONTINUES AROUND CHANNEL BEND (UPSTREAM). PRESSLEYILINER SITE PHOTO #5 - UPSTREAM END OF REPAIR REACH (LOOKING UPSTREAM) ALONG RIGHT BANK (REPAIR RIGHT 1). t NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY EXISTING SITE CONDITIONS ' PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 11'- 60' IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. - ' 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. t 6 BURIED CAR I 1 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. EXISTING GRAVEL BAR EXISTING GRAVEL BAR EXISTING TOP OF BANK, TYP. CROSS-SECTION #1 APPROX. LOCATION HISTORIC TOP OF BANK, TYP. c Y HOUSE' i _ LOG DEBRIS _ S1-iED BLDG. RIGHT BANK, SECTION B REPAIR AREA RIGHT BANK, SECTION B UPSTREAM REPAIR LIMIT (APPROX.) RIGHT BANK, SECTION DOWNSTREAM REPAIR LIMIT (APPROX.) B ` 0 \,?111i?,, `` ? 'Y???17777. v _ SEAL 24993 BEFORE YOU DIGI ! ••, ?.` R. ?, •? CALL 1-800-832-4949 ' '9 ••. kQ?NE?. • (V N.C. ONE-CALL CENTER 9 •, , . \ ITS THE LAWI ?,?'? D . ••^ ?? \? lJ \? '??IIIIIIII?,\ dui wz. F., z ?zl 0uz¢ 111 0 a ?aF z w° W€ 1 V U0 Z. L Q. , I w z 5 0 \l 00 0 a L Q 4 c 1 c L L c c c c c a z ? a 0 n?u ? aww ?' O J T m O?? s+ 0 p r0 Z ? Z Z F mm (h O N Z p (U W (W O O N O U O U w (A ?- z Fn o wp0W zz -) ?0z j.UF- _j z 0 U U) P w cn n w SHEET 04A L/\I.J IIIVV LL/VL VI YY1'\ I LI\, I I r. e 1 t I t e e s NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY EXISTING SITE CONDITIONS PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 1 "- 60' IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. - 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION DEBRIS JAM W /STEEL CABLE AND REPAIR PLAN. 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE / vo ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. CROSS-SECTION #2\\\\\ ?1 vyin APPROX. LOCATION LEFT BANK UPSTREAM REPAIR FAILED STAIRS / i LIMIT (APPROX.) D,- EXISTING EDGE OF WATER, TYP. RIGHT BANK, SECTION A DOWNSTREAM REPAIR LIMIT (APPROX.) CROSS-SECTION #3 APPROX. LOCATOIN / EXISTING GRAVEL BAR, TYP. R0 FLUN ?o DOWNED TREE SF.c? G ' \ - SEAL v ?. 24993 ;2?;•FN ?P:III.•?;, 1 RIGHT BANK, SECTION A BEFORE YOU DIG] LCENTE 9 DINE ?; UPSTREAM REPAIR CALL 1-800-632-4949 N.C. ONE-CALL CENTER LIMIT (APPROX.) IT3TFfELAW ?WI Uq Wz? z ?z u z z ? O z w W? z? 00 za W? Q. u.l z? z Z) o 0 0 0 c z J 0 Q U 0 z z D 0 U D 0 O I a II o0 N ? n %;a v mOS?gO El 709z p O h U O N WU < N U d I`- U) Fn 0 w0 zz :3 0 }U WO J z W In IL W SHEET 04 a t e NOTES: U) w PROPOSED REPAIR PLAN PROPOSED J-HOOK TYP. w 41 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY o Nz PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 1"= 60' DUI IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. "Z 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND Uz. INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION u0vv? AND REPAIR PLAN. a 3. LOCATIONS OF EXISTING U CROSS-SECTION #2'?? TILITIES AS SHOWN ARE APPROXIMATE APPROX. LOCATION Z ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. ,•'' / ??0 ?? ?w? Awl ,• ? 4. CONSTRUCT TOE STABILIZATION AS DIRECTED AT TIME OF CONSTRUCTION. ?PROPOSED CROSS VANE, TYP.,,'? zl PROPOSED APPROX. LIMITS OF DISTURBANCE a BEFORE YOU DIGI CALL 1-800-632-4949 ,•' , Q LEFT BANK N.C.ONE-CALL LAE ITS THE CENTER UPSTREAM REPAIR '• - •' w 0 U LIMIT (APPROX.) RIGHT BANK, SECTION A 0 TRANSITION BENCH TO MATCH EXISTING DOWNSTREAM REPAIR LIMIT (APPROX.) o SLOPE, TYP. AT THE END OF ALL BENCHES / 0 c c c PROPOSED LANDWARD = S SIDE OF BENCH, TYP. _ / PROPOSED REPAIRED CROSS-SECTION #3;, ' TOE OF SLOPE, TYP. z_ APPROX. LOCATION / PROPOSED BENCH, TYP. os. o , ,,• , ;,? -,,.- _ _ PREP o??am?? 1- ? Z L1 ? U O U N /' \? F <VIO ?ij2 w Q SOW ? 0 ' 'Niw Q Aid" z a UPPER 300' OF 'SECTION A' REPAIR AREA SHALL QQ? •saroti••i,? , HAVE INCREASED HEIGHT OF TOE STABILIZATION *ESTIMATED REPAIR LENGTH = 1550 'Q 9C1q S W W TYP. 7' - 8' SEAL W *LENGTH OF TOE 24993 ; U) STABILIZATION= 2100 - I. _ W p w a_ RIGHT BANK, SECTION A UPSTREAM REPAIR LIMIT (APPROX.) TE DISTURBED AREA = 2.7 ACRES ......C CL *FOR SHEETS Q5 & Q5A SHEET 0., 5 I BEFORE YOU DIGI CALL 1-800-632-4949 N.C. ONE-CALL CENTER ITS THE LAWI PROPOSED REPAIR PLAN SCALE: 1 "= 60' PROPOSED REPAIRED a TOE OF SLOPE, TYP. z . kfl -z Q? NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. 4. CONSTRUCT TOE STABILIZATION AS DIRECTED AT TIME OF CONSTRUCTION. )POSED J-HOOK, TYP. -PROPOSED LANDWARD SIDE OF BENCH, TYP. RIGHT BANK, SECTION B REPAIR AREA RIGHT BANK SECTION B UPSTREAM REPAIR LIMIT (APPROX.) CROSS-SECTION APPROX. LOCATIO#1 NN RIGHT BANK, SECTION B DOWNSTREAM REPAIR LIMIT (APPROX.) ?r sir 1 Qo •ss?oti9.i?, SEAL jry? S 24993 [/? ca U Wa o P, z Hz U z z < Q0< ..l tz?? z ?a w w z w CL }w Z Z) 0 0 0 o 2 c r C C C C 5 n a mmZ i:i7 UOV N S< U W< W O ° N 000 z F-a w<w Zd::) J w ? ? W 0 Z _j W 0 U) U) U wa a? a SHEET 0, 5A e C [ICI 1 F 1 C CONSTRUCTION SEQUENCE: 1. Obtain NCDENR, USACE, & local authority approval for construction. The Contractor must strictly adhere to the conditions of the U.S. Army C.O.E. & the NCDENR DWQ as set forth in the 404 & 401 permits. 2. Notify NCDENR (Land Quality Section) If necessary, ten days prior to construction. 3. Locate existing utilities on site. Coordinate access, staging area and temporary stockpile areas with Owner and Engineer. Engineer to identify and mark limits of disturbance" within channel 4. Install temporary sediment & erosion control measures, access roads, channel access, staging area, and temporary facilities. NOTE: All installed temporary sediment and erosion control measures will be inspected weekly or after a major rainfall event (> 0.5 inches) by the Contractor. Upon inspection, any necessary repairs will be performed by the Contractor. 5. Clear and grub in required areas for stream repair. Remove and stockpile topsoil in areas to be excavated. Stockpile in areas as Directed by Owner / Engineer. Surround Stockpile Areas with 2 Rows of Silt Fence. 6. Perform stream bank repairs as shown on plans and directed by engineer. Install In-stream structures and toe stabilization as directed by the engineer at the time of construction. Contractor shall not cross "limits of disturbance" without prior approval of the engineer. 7. Stabilize repaired bank zones (lower, mid-, and upper) as shown in details. Apply temporary erosion control seeding measures to disturbed areas as final grading Is reached. Re-distribute topsoil, augment as necessary to meet planting specifications. 8. Perform tree and shrub planting as specified. Engineer to be notified prior to planting observation to approve planting bed conditions and plant materials. Tree and Shrub plantings may be delayed until Fall season with approval of owner & Engineer. 9. Apply permanent seeding measures. Remove temporary sediment & erosion control measures including construction entrance (if necessary). 10. Coordinate for walk-thru inspection with Owner, Engineer, and Agency Representatives. 11. Plant all live stake plantings (and tree and shrub species if delayed) during Fall season. RIGHT BANK (1/3) CHANNEL WIDTH LEFT BANK CLA55'A' OR'B" AGGREGATE STONE 20°-3 STEP )NAL) FLOW SCOUR POOL PLAN -30° GEOTEXTILE FABRIC GEOTEXTILE I/3 CHANNEL WIDTH (NOT TO 5CALE) PLAN FLOW v BED GEOTEXTILE FA13PJC-Z FOOTER / 1/3 CHANNEL WIDTH PROFILE ROCK STEP (OPTIONAL) J-HOOK WITH STEP-POOL DETAIL FLOW w ROCK STEP (OPTIONAL) PROFILE CR055 ROCK VANE WITH 5TEP-POOL DETAIL (NOT TO 5CALE) 13ANKFULL STAGE 5000RPOOL BANKFULL STAGE R POOL SEAL 24993 a, a est. -,99,t ••......••,?L 0Wr WZ" 4A ° HZi ?a? ?z UO-< Uz z a ?a Z ?a W? z? LW C7 w? ?Q Z ?0 ® U 0 0 0 00 Q 0 Z Z 0 U 0 O Q n U? Ju W? In W/ U [[nn ZZh ?Oo< (n o ? Z a-- 0 ",3 5HEET QG CLAI W OR '13" AGGREGATE STONE I EOTID JILE FABRIC ROCK STEP ! (OPTIONAL) O FOOTER ROCKS SCOUR POOL I EXISTING ERODED AND FAILED CHANNEL BANK (TYP,) OVER-EXCAVATE LOOSE MATERIALS AT TOE AND BACKFILL WITH COARSE (BED) MATERIAL LOWER-BANK ZONE TOE STABILIZATION BOULDERS FOOTER BOULDERS NON-WOVEN GEOTEXTILE CASING ("T 70 sc") NOTES; 1. SEE SECTION 7.5 OF THE SPECS FOR THE SIZE OF BOULDERS 2. AVERAGE HEIGHT OF TOE STABILIZATION WILL BE APPROX. 4' WITH THE EXCEPTION OF UPPER 300' OF SECTION "A" REPAIR AREA WHICH WILL BE 7'-8'. EXISTING CHANNEL BED ? M-aid SEAL 24993 V . S , .? % alms r C? '/I , i 1111111111` ?u^ Wz HZI .<.?g 0* z ?0z a Oa? z ?a w w zq? L9 ? v' z w? Zzz ?o W O U H n 0 0 0z z n o o O U Q 0 Q Q J_ Q H? tn- w Z O Z? J Q 'N ?j J Q 0- 0 SHEET Q7_ TOE STABILIZATION DETAIL r 0 n 0 TREE do SHRUB PLANTING AREA (RANDOMLY INTERMIXED TREES & SHRUBS) NDTH OF BENCH VARIES ALONG REPAIR REACH (5'-50').KMINIMUM DESIRED WIDTH IS 5' .._..-..- *II— - F-..- ?\ 1 PROPOSED REPAIRED TOP OF BANK EXISTING ERODED AND FAILED CHANNEL BANK (TYP. STABILIZE AND PLANT BENCH SIMILAR TO MID-BANK ZONE PROPOSED REPAIRED BENCH 65.0' (TYP) APPROX. ORIGINAL BANK & CHANNEL LOCATION TYPICAL EXISTING BANK & CHANNEL LOCATION 3.4' (TYP) lee - 1 i oo0a na dod 06409 ?pna 606 O 50.0' (TYP) PROPOSED REPAIRED TOE OF SLOPE NOTE: 1. RESTORE CHANNEL WIDTH AT TOE OF SLOPE AS SHOWN ON PROPOSED REPAIR PLAN. 2. BREAK POINT ON SLOPE FOR REPAIR AT ELEV.: VARIES 3. DEPTH AND EXTENTS OF UNDERCUT TO BE DETERMINED BY ENGINEER AT TIME OF CONSTRUCTION. 4. REPAIR MAY BE CONSTRUCTED WITH OR WITHOUT TOE STABILIZATION DEPENDING ON SITE CONDITIONS AS DETERMINED BY ENGINEER. 5. LOWER BANK ZONE TO BE CONSTRUCTED USING RIVER BED BORROW MATERIALS AS APPROVED BY THE ENGINEER. MID-, AND UPPER BANK ZONE TO BE CONSTRUCTED USING OTHER APPROVED MATERIALS. 6. BANK REPAIRS TO BE BENCHED INTO EXISTING FAILED SLOPE AS DIRECTED BY THE ENGINEER AT THE TIME OF CONSTRUCTION. REPAIR OPTION I (NOT TO SCALE) AVERAGE nLL HEIGHT- t3' MID) NOTE: GRADE FROM EXISTING TOP OF BANK TOWARD LANDWARD EDGE OF BENCH AT MAX. 3:1 SLOPE. ELEV. VARIES / ELEV. VARIES OVER-EXCAVATE LOOSE MATERIAL 0 TOE do BACKFILL W/ COARSE (BED) MATERIAL. TOE STABILIZATION W/ NON-WOVEN GEOTEXTILE FABRIC. LOCATION TO BE DETERMINED BY ENGINEER 0 T.O.C. Wza ,. Hazp ?z r?Uzz a to z z ?a as w? z z wh Z z z J one w0Q U L zVi2 0 Q OO 0O Q L Q 0 z 0 U 0 0 of $ 111 J wQ kn w a/ ZQ J ? ?W %li ii (n Q (n U . ?, ,. fESB10 •••• ?' 2: Q4,o ??t 7' Ds _ SEAL ' 24993 5HEET Q7A 7 L r n EX15TING FROM EXISTING ROAD __lq 2"-3" COARSE AGGREGATE (RAILROAD BALLAST) G' HUMP TO DIVERT RU FROM EXISTING ROAD NOTES: I . A STABILIZED PAD OF CRU5HED 5TONE SHALL BE LOCATED WHERE TRAFFIC WILL BE ENTERING OR LEAVING A CONSTRUCTION 51TE TO OR FROM AN EX15TING ROAD. 2. 5TONE TO BE 2 - 3 INCH WASHED 5TONE RAILROAD BALLAST. 3. THE ENTRANCE 5HALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC STREETS OR EXISTING PAVEMENT. THIS MAY REQUIRE PERIODIC TOP DRE55ING WITH ADDITIONAL 5TONE A5 CONDITIONS DEMAND AND REPAIR AND/OR CLEANOUT OF ANY MEASURES U5ED TO TRAP 5EDIMENT. 4. ALL SEDIMENT 5PILLED, DROPPED, WASHED OR TRACKED ONTO PUBLIC 5TREET5 MUST BE REMOVED IMMEDIATELY. 5. WHEN NECESSARY WHEEL5 MUST BE CLEANED TO REMOVE SEDIMENT PRIOR TO ENTERING A PUBLIC 5TREET, WHEN WASHING 15 REQUIRED, IT 5HALL BE DONE ON AN AREA 5TA13ILIZED WITH CRUSHED STONE WHICH DRAINS INTO AN APPROVED 5EDIMENT BASIN. EXACT LOCATION OF TEMPORARY CON5TRUCTION ENTRANCE TO BE DETERMINED AT PRE-CON5TRUCTION MEETING 5TAB1 LIZED CONSTRUCTION ENTRANCE (NOT TO SCALE) EXISTING CHANNEL BED EX15TING EDGE OF WATER 0 0 0 CONTRACTOR TO CUT - ACCE55 RAMP TO 5LOPE A5 NEEDED FOR EQUIPMENT ACCE55 MINIMUM 12" LAYER CLA55'AI-- RIPRAP WITH MIN. 12 OZ. WOVEN GEOTEXTILE FABRIC UNDERLAIN 3G' 0 5, y ? o? 0 p PLAN DIVER5 ON DITCH NOTE: CONTRACTOR TO REFRESH 5TONE LAYER AND AUGMENT EX15TING TOP OF BANK A5 NECE55ARY TO REDUCE EROSION AND 5EDIMENTATION CONTRACTOR TO CUT DIVERSION DITCH ACCE55 RAMP TO 5LOPE A5 NEEDED FOR EQUIPMENT ACCE55 - -III II= EX15TING FAILED BANK I I=I =I =I MATERIAL TO BE REMOVED - I - I-I EXISTING FAILED I I = I I- TOP OF BANK EIX15TING CHANNEL BED I =I 1= LAY BACK 51DE 5LOPE5 OF ACCE55 TO STABLE GRADE MINIMUM 12" LAYER - CLA55'A' RIPRAP CHANNEL ACCE55 DETAIL PROFILE (NOT TO 5CALE) MINIMUM 12 OZ. WOVEN GEOTEXTILE FABRIC to-to SEAL 24993 •?, tYl?; ??'?QINE? :•• ?fI D , C, Iffill 'J"% moan Wz a,. • Fzm ?z ?Uzz Oa a ?a OZ z ?a w? w z? z? wh ZQ z one o6 n 0 0 ? Z 0 z 000 ?o? 0 Q 0 a_ Q .1s III :flvll g tall'ill a J OL 0Q U Oo 0 W 5HEET Q8 r J u 0 NOTE5: 2" STEEL ANGLE 1. FILTER BARRIERS SHALL BE IN5PECTED IMMEDIATELY AFTER EACH RAINFALL AND DAILY DURING PROLONGED RAINFALL. REPAIR 5HALL BE MADE A5 NECE55ARY. 2. FABRIC 5HALL BE REPLACED PROMPTLY IF FOUND TO BE IN DISREPAIR. 8' MAX FOR STD. STRENGTH FABRIC WITH WIRE ME5H REINFORCEMENT nR SYNTHETIC FILTER FABRIC SHALL BE BACKFILLED A MIN. OF 8" 3.5EDIMENT DEP051T5 SHALL BE REMOVED AFTER EACH 5TORM EVENT AND WHEN DEP051T5 REACH APPROXIMATELY 1/3 HEIGHT OF BARRIER. BANK OR BENCH COIR MATTING I I I -1- BASE FLOW I I - WATER ELEVATION I I= IT I I I itt-l -1 I I-"*4 12" ECO-5TAO -1 I I-I 11=111-111-1 24" ECO-5TAKE0 PROFILE VIEW • TRENCHED TOP OF MATTING TO A DEPTH OF AT LEA5T 120, STAKE OR STAPLE IN PLACE, 4 BACKFILL TO DE51GN GRADE • MINIMUM 24" ECO-5TAKE50 IN5TALLED ALONG TOE OF MATTING (Intercept between water surface and bank) 24" F( 5YNTHETIC FILTER FABRIC ATTACHED TO PO5T5 WITH APPROVED FA5TENER5.PLACE ON UPHILL 51DE OF FENCE. P05T 5YNTHETIC FILTER FABRIC 18" GROU MAX. EXCAVATE 8"x8" TRENCH UP5LOPE ALONG LINE OF PO5T5. EXTEND FILTER FABRIC INTO TRENCH, BACKFILL TRENCH AND COMPACT 501L • MINIMUM 2' CENTER5 ALONG BOTTOM • MINIMUM P OVERLAP AT JOINING 5ECTION5 OF COIR MATTING COIR MATTING DETAIL (NOT TO SCALE) ECO-5TAKEO • 12" ECO-5TAKE50 IN5TALLED IN BANK FLU5H WITH COIR MATTING ABOVE BOTTOM ROW OF 24" ECO-5TAKE5® • ECO-5TAKE50 SPACED AT MAXIMUM 3' CENTERS (APPROX.) BOTH DIRECTION5 TEMPORARY 5EEDING SPECIFICATIONS General Areas where no 5ub5tantial or Significant progress 15 made for more than 15 days should be temporarily Seeded a5 follows. All areas Should be seeded, mulched, and tacked. Incidental grading shall not constitute 5ub5tantial or significant progress in construction activity. 5eedmg and mulching shall be done immediately following construction. All disturbed areas shall be dressed to a depth of 8 mche5. The top 3 mche5 shall be pulverized to provide a uniform seedbed. v7?? u zQ N eI • HZ' ??? ?z U zZ Z UO-< a 0a Z ?a w? w z? v Z w? L9 z _ 0 W O U s Z Seeding 5eedmg Dates May I - Aug. 15 Aug. 15 - May I 5eedmg 5pecie5 German Millet Rye (grain) Rate (Ib5/acre) 40 60 5o11 Amendments Follow recommendations of 5011 te5t5 or apply 2,000 117s/acre ground agricultural limestone and 750 Ibs/acre 10-10-10 fertilizer. Mulch Mulching Shall con515t of small gram straw applied at a rate of 70 Ib5./ 1000 sq.ft. Mulched areas shall be mechanically tacked in place (or other approved tacking method). No asphalt shall be used for tacking. Use Jute, exc651or matting or Similar material to cover exposed areas of concentrated flow. U n inFannnrv Inspect and repair mulch frequently. Rbfertilize and reseed a5 required to maintain vigorous temporary vegetative cover during construction. 4 l' t SEAL A S 24993 1 f... 7 • ?? % 4P, n 0 Q 0 O, 0 O Q Q 0 Z z 0 Q s II? COME R J CV Z- 0n Z? Op CL/ 5HEET Q9 51LT FENCE U MUNI VILW n n TREES SPECIES COMMON NAME TOTAL M 51ZE QUERCUS ALBA WHITE OAK TBD BARE ROOT PLATANUS OCCIDENTALIS AM. SYCAMORE TBD BARE ROOT QUERCUS COCCINEA SCARLET OAK TBD BARE ROOT BETULA LENTA SWEET BIRCH TBD BARE ROOT LIRIODENDRON TULIPIFERA YELLOW POPLAR TBD BARE ROOT TSUGA CANADENSIS E. HEMLOCK TBD BARE ROOT BETULA ALLEGHANIENSIS YELLOW BIRCH TBD BARE ROOT ACER RUBRUM RED MAPLE TBD BARE ROOT BETULA NIGRA RIVER BIRCH TBD BARE ROOT 5HR UB5 5PECIE5 COMMON NAME TOTAL # 51ZE CARPINUS AMERICAN TBD BARE ROOT/POTTED CAROLINIANA HORNBEAM HAMAMELIS AMERICAN TBD BARE ROOT/POTTED VIRGINIANA WITCHHAZEL ALNUS BROOKSIDE TBD BARE ROOT/POTTED SERRULATA ALDER LEUCOTHOE FONTANESIANA HIGHLAND DOGHOBBLE TBD BARE ROOT/POTTED SALIX NIGRA BLACK WILLOW TBD BARE ROOT/POTTED CORNUS AMOMUM SILKY DOGWOOD TBD BARE ROOT/POTTED SALIX SERICEA SILKY WILLOW TBD BARE ROOT/POTTED NOTES: 1. TREE * 5HRUB SPECIES TO BE RANDOMLY INTERMIXED ON G'XG' SPACING UTILIZING AT LEAST 5 OF THE 9 TREE 5PECIE5 L15TED AND 3 OF THE 7 5HRU13 5PECIE5 LISTED. MATERIAL 50URCE AND DESIRED 5U135TITUTION5 TO BE APPROVED BY DESIGNER. 2. TOTAL NUMBER OF TREES 15 1,220. 3. TOTAL NUMBER OF 5HRUB515 1,220. 4. TREE AND SHRUB PLANTING TO BE ON MID-BANK AND UPPER BANK ZONE. I 2 3 Open planting Place bare-root Close hole with hole with 5eedling in hole - 5hovel or Auger- 5hovel or Auger root collar at no air space surface around roots BARE-ROOT SEEDLING PLANTING DETAIL (NOT TO SCALE) TI WOODEN 5TA LIVE STAKES TO CON515T OF BLACK WILLOW, 51LKY DOGWOOD AND 51LKY WILLOW PLANTED A5 SHOWN IN DETAIL ALONG LOWER BANK ZONE. SLOPE BREAK OR BENCH TREE SHELTER W/ BASE APPROX. I" INTO GROUND BASE FLOW WATER ELEVATION : F1 r, II 1-1 II- ANGLE-CUT END PROFILE VIEW U TREE SHELTER DETAIL TO BE INSTALLED ON ALL BARE-ROOT AND CONTAINERIZED PLANTED TREES (NOT TO SCALE) NOTE: TREE SHELTER SHALL BE PHOTODEGRADABL.E (IN FULL SUNLIGHT ENVIRONMENT) AND/OR BIODEGRADABLE • LIVE STAKES INSTALLED IN BANK WITH DEAD-BLOW HAMMER • 4/5 OF STAKE IN GROUND • BUDS ORIENTED UPWARDS • 3' CENTERS (APPROX.) • CUT W05ED END OF LIVE STAKE AFTER INSTALLATION IF DAMAGED DUE TO INSTALLATION (I.e. damaged bark, Split ends, etc.) LIVE STAKE PLANTING DETAIL (NOT TO SCALE) ;mm rA Un z ?z uuz? z o.< a ?a Z w L w? z t7 z w? Z Q z ?0 w OU ? 0 0 ?z o z 0Oo 0p0 D Q 0 L Q a= g e i? L? ?z ZZ 10 SEAL • ••9 ?J ` ' 24993 1I, 1 ?,: •a: SHEET a, QIO Office Use Only: USACE Action ID No. DWQ No. Form Version October 2001 If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. Processing Check all of the approval(s) requested for this project: ® Section 404 Permit D ????n/7? ? Section 10 Permit VV D ® 401 Water Quality Certification ? Riparian or Watershed Buffer Rules JULl., 5 2005 DENR - WAikR QUALITY 2. Nationwide, Regional or General Permit Number(s) Requested: I?19aMYMf ftc3rA ArF.aeRAJXfl If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII - Mitigation), check here: ? II. Applicant Information Owner/Applicant Information Name: Haywood County - Jack Horton, County Manager Mailing Address: County Courthouse 215 N. Main Street Waynesville, North Carolina 28786 Telephone Number: 828-452-6625 Fax Number: 828-452-6715 E-mail Address: jhorton r haywoodne.net 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Ken Futreal Company Affiliation: Southwestern NC RC&D Council Mailing Address: 367 Dellwood Road Building, E, Suite 3 Wavnesville, N.C. 28786 Telephone Number: 828-400-3279 Fax Number: 828-452-7031 E-mail Address: kf itreal a yahoo.com Page of 12 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project:llavwood County Emergency Watershed Protection Program (HC-102) 2. T.I.P. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): Pressley-Liner Site (See attached sheet for 4. Location County: Haywood Nearest Town: Cruso Subdivision name (include phase/lot number): Directions to site (include road numbers, landmarks, etc.): This repair section of the East Fork of the Pigeon River is located off Cruso Road (US 276) and Mountain Crest Lane, approximately 5.4 miles southwest of the intersection of US 276 and US 110. 5. Site coordinates, if available (UTM or Lat/Long): (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or condition of the site at the time of this application: Land use is residential. 7. Property size (acres): See attached sheet for acreages. 8. Nearest body of water (stream/river/sound/ocean/lake): East Fork of the Pigeon River 9. River Basin: French Broad (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/.tdniin/niaps/.) Page 6 of 12 10. Describe the purpose of the proposed work: Stream bank repair and stabilization. When possible excavation equipment (backhoe) will access deposition areas from the stream bank and not encroach into the stream channel. The work described in this Stream Repair and Bank Stabilization Plan (Repair Plan) is ur(,vent and compelling wort: under the National Resource Conservation Service (NI2CS) Emer-'enev Watershed Protection (EWP) pro,Yram to protect existin« property and structures. 11. List the type of equipment to be used to construct the project: Excavators, dozers and dump trucks 12. Describe the land use in the vicinity of this project: Residential. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. V. Future Project Plans Are any 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: None anticipated VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. Page 7 of 12 1. Wetland Impacts Wetland Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Located within 100-year Floodplain** (es/no) Distance to Nearest Stream (linear feet) Type of Wetland*** n/a * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mecnamzea eteanng, graatng, nu, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at http `w?aw.icnn.?ov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: n/a Total area of wetland impact proposed: n/a 2. Stream Impacts, including all intermittent and perennial streams Stream Impact Site Number (indicate on map) Type of Impact* Length of Impact linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent'? (please secif ) I Fill and excavation 1550' East Fork of the Pigeon River 30'-100' Perennial * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at www.uses.+<ov. Several internet sites also allow direct download and printing of USGS maps (e.g., ww•w.topoione.com, ?%\vw.mapquest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 1550 If Page 8 of 12 3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Name of Waterbody (if applicable) Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) n/a List each impact separately and identify temporary impacts. impacts include, but are not umueu io: uu, cxca%auun, uicugmg, flooding, drainage, bulkheads, etc. 4. Pond Creation if construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The stream bank on both sides needs to be rewired and restored to avoid continued sedimentation and future destruction of property. Restoring the channel to the pre-storm conditions and stabilizing the stream banks will provide the appropriate protection against future high water storm events. Access for this repair work is alone Mountain Crest Road and possible along Cruso Road. When at all possible, equipment will be kept out of the stream channel and stream crossings will be minimized. Temporarv and permanent herbaceous vegetation shall be planted on all bare soils within 15 davs of ground disturbing activities. Page 9 of 12 VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://1]2o.enr.state.nc.us/newetlands/strm-,Ide.litm]. 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. 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that you would like to pay into the NCWRP. Please note that payment into the NCWRP must be reviewed and approved before it can be used to satisfy mitigation requirements. Applicants will be notified early in the review process by the 401/Wetlands Unit if payment into the NCWRP is available as an option. For additional information regarding the application process for the NCWRP, check the NCWRP website at http://112o.eiir.st ite.nc.tis/\vipiindex.him. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Page 10 of 12 Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): IX. Environmental Documentation (DWQ Only) Does the project involve an expenditure of public funds or the use of public (federal/state/local) land? Yes ® No ? If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 213 .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ? No ® If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required Mitigation 1 3 2 1.5 Total Page 11 of 12 * Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 213.0242 or.0260. XI. Stormwater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwatcr controls proposed in order to protect surface waters and wetlands downstream from the property. n/a XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ? No Is this an after-the-fact permit application? Yes ? No XIV. Other Circumstances (Optional): 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). Due to Federal re(ulations re2ardin2 the use of EWP, f indine construction of all EWP work must be under construction by September of 2005. Page 12 of 12 (Agent's signature is valid only if an authorization letter from the applicant is provided.) Property Owners for the Pressley-Liner Site (Starting Upstream) Property Owner Pin # Acrea e Owner Address F.D. & Louise Pressley 8663538447 55.5 407 Mountain Crest Lane, Canton, NC 28716 David & Rile Shuford 8663435081 3.1625 12489 Cruso Road, Canton, NC 28716 Alexander & Joan Robb 8663435248 4.11 184 Leatherwood Road, Waynesville, NC 28786 Carl & Desiree Feest 8663434409 0.88 3326 W. Park Road, Hollywood, FL 33021 George Beistel 8663433587 1.6375 1506 Abbe Cir, Asheville, NC 28805 Dennis Strickland 8663434859 1.479 3441 25th Ave SW, Naples, FL 34117 Carroll & Ma Ellen Pressley 8663443041 1.5196 12287 Cruso Road, Canton, NC 28716 Harry & Cheryl Liner 8663446544 5.011 108 Springdale Lane, Canton, NC 28716 . Harry & Cheryl Liner 8663445446 0.393 108 Springdale Lane, Canton, NC 28716 . Christopher Lowe 8663442204 4.61 12261 Cruso Road, Canton, NC 28716 East Fork, LLC 8663457365 65.742 P. O. Box 5818, Hilton Head Island, SC 29928 I 401/404 PERMITTING PACKAGE HC-102 PRESSLEY-LINER SITE HAYWOOD COUNTY EWP HAYWOOD COUNTY, NORTH CAROLINA McGill 1 ASSOCIATES t CONSULTING ENGINEERS ASHEVILLE,NORTH CAROLINA i STREAM REPAIRS & BANK STABILIZATION PLAN FOR Pressley-Liner Haywood County, North Carolina -- Tim `i?y *M Prepared for HAYWOOD COUNTY SEAL 24993 F 0. C Prepared by: McGill ASSOCIATES July 2005 In conjunction with: • Soil & Environmental Consultants, PA Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. 1. PROJECT PURPOSE & DESCRIPTION The purpose of this project is to stabilize and/or repair eroded and unstable stream banks along the East Fork of the Pigeon River that were impacted by flood flows from Hurricanes Frances and Ivan in September of 2004. The severely eroded stream banks consist of exposed soil on moderate to steep slopes, which, if transported during another high flow event, could block downstream culverts and bridges as well as cause increased erosion and sedimentation in vulnerable High Quality waters. As desired by the landowner(s) and charged to us by Haywood County, NC, the proposed design is t intended to reconstruct the damaged bank(s) as "close as possible" to the original pre- disturbance conditions. This site is not within a designated Critical Habitat for the Appalachian Elktoe Mussel (Alasmidonta raveneliana) (AE) zone. However, the continued sedimentation occurring from this damaged site is an ongoing impact to the downstream waters and its careful, quick repair is critical to protecting stream resources. The work described in this Stream Repair and Bank Stabilization Plan (Repair Plan) is urgent and compelling work under the National Resource Conservation Service (NRCS) Emergency Watershed Protection (EWP) program to protect existing property and structures. NRCS is the funding agency and Haywood County / Haywood Soil and Water Conservation District (SWCD) is the sponsor and responsible party for the project. Work on the site consists of repair and stabilization effort only, and is not considered natural channel restoration or enhancement work. However, some methods and approaches utilized in the proposed repairs are routinely applied in natural channel design efforts due to their ability to protect channel banks from shear stresses and the resultant erosion. All work in or near surface waters will be fully supervised by trained personnel from both McGill Associates and Soil & Environmental Consultants (S&EC). This site is just one of seventeen (17) similarly damaged sites selected for repair within Haywood County as part of Haywood County bid invitations HC-102, HC-103, and HC-104. Each of the sites is considered independent of one another (non-contiguous) due to the physical separation typically in excess of several thousand feet between sites. 2. SITE DESCRIPTION Sites #15 & 16 - Pressley-Liner Site - East Fork of the Pigeon River (WS-III, Tr Waters) The repair site is approximately 1550 feet in length and is located along the East Fork of the Pigeon River in Haywood County, NC. This area is located off Cruso Road (US 276) and Mountain Crest Lane, approximately 5.4 miles southeast of the intersection of US 276 and US 110. Please refer to repair plans for photographs, mapping, imagery, and details of existing site conditions. Approximately 1550 feet of both channel banks were severely damaged through bank erosion and soil loss. The repair is located on property owned by East Fork LLC, Mr. Christopher Lowe, Mr. Harry and Mrs. Cheryl Liner, Mr. Carroll and Mrs. Mary Ellen Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. 1 Pressley, Mr. F.D. and Mrs. Louise Pressley, Mr. Dennis Strickland, Mr. George Beistel, Mr. Carl Feest, Mr. Alexander and Mrs. Joan Robb, and Mr. David and Mrs. Riley Shuford . Banks along the repair reach range in height from roughly 7 to 17 feet and are near vertical in some locations. Based on a review of available mapping and imagery, the width of bank loss vanes from 5 feet to as much as 25 feet along the repair reach. No repairs have been performed along the repair reach at this time and the existing (failed) banks are continuing to erode. Little to no available repair materials exists along this portion of the reach. Access to the site will be via a driveway located on Mr. and Mrs. F.D. Pressley's property and a driveway located on Mr. and Mrs. Harry Liner's property, which are close to the river. Because of dense vegetation, an alternate access point may need to be coordinated with the Owner. Where visible, site utilities were located as described on the site repair plan. Utilities must be located and marked by contractor prior to construction. The disturbed area for the proposed repair and stabilization is 2.7 acres. Therefore, Haywood County will have to secure an Erosion Control Permit from the N.C. Division of Land Quality. The Pressley-Liner site work described in this plan will need to be permitted by the U.S. Army Corps of Engineers (Section 404 permit) and also the N.C. Department of Environment and Natural Resources, Division of Water Quality (Section 401 Water Quality Certification). 3. TECHNICAL REPAIR DESCRIPTION Members of our design team visited the repair site to gain an understanding of current site conditions and perform a general site characterization. While on site, we observed characteristics of the site and surrounding area, verified surface and channel flow conditions, and observed existing property boundaries, select utilities, site accessibility, and existing water conveyance structures. During this process, we observed exposed eroded banks along the repair reach (which were caused by the hurricanes) to typify failed bank height, slope, materials, vegetation, and general site conditions. While on site, we also observed existing channel banks immediately upstream and downstream of the repair area as well as the existing channel banks on the opposite side of the watercourse (in most cases only one bank of the existing channel was damaged). Utilizing GPS, laser-level and Total Station equipment, we collected select site data to locate the extent of the damage and characterize the existing conditions along the repair reach. We field measured one or more bank cross-sections while on site. The cross- section(s) location were selected to typify the existing bank condition along the repair reach. We photographed the project sites and prepared field notes for use in the preparation of our design. A plan sketch of the existing site conditions along typical cross-section(s), taken along the repair reach, is shown in the Construction Drawings. Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. After completing our field visits, we performed a preliminary review and evaluation of available site mapping to include USGS 7.5 Minute Quad data, Digital Orthophoto Quad (DOQ) data (1998), Color Infrared imagery (2004), Haywood County Soils Survey map sheets, as well as other available map data. Using Arc-GIS (with available extensions) and Digital Elevation Models (DEM) from the NC Floodplain Mapping Project, we estimated the contributing drainage area (at the project site) at approximately 34.5 square miles. We also researched available hydrologic and hydraulic data for the project site, including a review and evaluation of available Regional Curve data (NCSU - Stream Restoration Institute (SRI), Preliminary Mountain Curve) for incorporation into the repair design process as applicable. Using the data collected during our field visits, we developed a rough site sketch defining existing conditions with annotated hand notes, descriptions, and repair recommendations. These notes were later refined for use in the development of our repair "concept" for the site roughly defining the locations, sizes, and types of modifications and features proposed for construction at the site. In addition to the Existing Site Plan, we also developed our Proposed Repair Plan including plan view, typical repaired bank cross-sections, construction details for typical site features, technical construction specifications, and planting recommendations for the recommended repairs. 4. DESIGN CONSIDERATIONS As described in our technical proposal, we considered a range of possible repair alternatives for the Pressley-Liner Farm Site. These repair alternatives included: 1) Repair-in-Place Only, 2) Repair-in-Place augmented with In-Stream Structures, 3) Stream Restoration - "Natural Channel Design." 7 1 As our understanding of this and other repair sites has increased, and in an effort to streamline the approach to repairs, we further developed these repair alternatives. In our design development, we strived to utilize techniques which would be simple and understandable to a "typical" general contractor (reducing the need for specialty contractors) and which could be easily modified or refined in the field by the designer (or contractor) based on site conditions encountered during construction. It was also our intent that repair and stabilization methods would be constructed with commonly used and readily available construction materials. Recommended repairs have been designed with robust methods to withstand typical channel discharges and erosive channel forces. One commonly observed approach to such bank repairs includes a complete lining of repaired banks with large boulders or riprap. It is our opinion that such an approach would be undesirable for three main reasons. 1.) These repairs do not take into account the primary reason for the damage in the first place, that of excessive shear stresses on the bank and tend to serve as a "band- aid" approach to bank repairs. 2.) Such repairs utilize excessive volumes of rock resulting in considerably high repair costs. 3.) The placement of large volumes of rock 4 t P Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. for continuous lengths in effect "armors" the banks and fails to provide the desired (reconstructed) habitat that previously occurred naturally within the system (boulder, cobble, gravel substrate materials) bed and banks. Such habitat is key to a variety of aquatic species. Our selected repair alternative for the site includes repairing the failed banks back to their pre-disturbance location (through fill placement) and augmenting the repair with in- stream structures. The proposed repair plan calls for the utilization of off-site borrow materials including riverbed borrow consisting of sand, gravel, cobble, and small boulders for the reconstruction of the lower bank zone. Elevations above the lower bank zone will be constructed utilizing varying fill materials including both riverbed borrow and other suitable borrow sources. Based on the observed (and measured) condition of the failed bank and the amount of disturbance that has occurred the bank repair alone (without supplemental in-stream structure reinforcement) would likely be insufficient to withstand future flood flows. The installation of in-stream rock (boulder) structures will reduce near bank stresses along the repair reach to protect the rebuilt banks. Additionally, our repair also calls for the installation of toe stabilization as necessary along the reach in areas of excessive scour in tie-in to existing stabile banks. The designer may also designate other areas requiring toe stabilization at the time of construction. This approach to bank repairs will improve the overall potential for the success of the repair. The installation of structures will protect channel banks with a significantly smaller rock volume (when compared to bank lining) thereby reducing overall repair costs. One additional benefit to this type of repair is the replacement of a natural (less structural) repair that is more appropriate for the reach and generally more aesthetically desirable. 5. PROPOSED REPAIR PLAN During our evaluation of the site, infrared imagery (2004) was used to estimate the pre- disturbance location of the "channel bank." This location was then used to develop the repaired banks location as shown in our Repair Plan. Typical cross-section(s) for the repair were then developed to depict proposed repair characteristics including but not limited to slopes and slope breaks, stabilization methods, and planting recommendations. ' NOTES: ' 1. Our repair plan is designed to repair and stabilize the banks along the subject reach and is not considered natural channel restoration or enhancenrerrt work. In addition, while consideration was given to select characteristics of the channel, it should be recognized that a complete morphological evaluation of the repair reach was not performed nor does this report (or repair) represent such all evaluation. However, sorrre nrelhods and approaches utilized in the proposed 5 l 5 y 200 Pressley-Liner - Stream Repairs & Bank Stabilization Plan Ju Haywood County Invitation # HC-102 McGill Associates, P.A. repairs are routinely applied in natural channel design: ef/oris due to their ability to protect channel banks from shear stresses and the resultant erosion. " " location and the resultant channel 2. It should be noted that this "channel bank ' width" is not to be considered the bankfull channel edge or bankfull width (as is routinely described in Natural Channel Design Methodology), nor should it be considered the "edge of water" as this location will differ for various reasons. It is however, a rough interpretation (estimate) of the pre-existing channel bank location based oil the best available pre-damage site and mapping data, discussions with landowners, observation of undisturbed channel segments inunediately upstream and/or downstream of the site, and experience on similar ' projects. 3. Due to previous alterations of the channel including but not limited to bridge construction, batik grading, the construction of flood levees, and in-channel quarry operations, channel banks, widths, and slopes have been modified considerably. In turn, the identification of the "natural" condition (dimension, pattern, and profile) of the channel is often difficult or indeterminate. For comparison purposes, we attempted to confirm our "channel bank" location by comparing the resultant "channel width" to available Regional Curve data. Based on a review of site data (upstream and/or downstream) and our estimated "channel bank" location, we estimated the pre-disturbance "channel width" at approximately 68.0 feet. We compared this "channel width" to estimated bankfull width as determined from available (preliminary) mountain Regional Curve data (SRI) for the appropriate drainage ' area. The regional curve indicates a bankfull width of approximately 72.9 feet based on a drainage area of 34.5 square miles. Based on this comparison it is our opinion that the estimated pre-disturbance "channel location" is appropriate. r ? 11 H As shown on the attached repair plans and design details, we recommend that the repaired slope be reconstructed and backfilled with excavated channel material (or deposited material recovered from the floodplain), available on-site or off-site earth fill, and in some cases imported stone aggregate. The location of the toe of the repaired slope will be field determined to allow for the development of a typical repair application along the reach. Our Repair Plan calls for the incorporation of a single repair option, Option 1 for both banks. See the proposed repair cross-sections depicted in the Repair Plan. Repair Option 1 For Repair Option 1, our design has divided the repaired bank into three bank zones, Upper, Mid-, and Lower for the purposes of slope, stabilization measures, and planting recommendations. A floodplain of varying width will be constructed between the Lower and Mid-Bank Zones. 6 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. Grading & Stabilization We recommend that the Lower Bank Zone be graded (or constructed) with the previously described materials at a slope not in excess of 2H:1 V to the approximate elevations described in the repair cross-section. As this zone is within the "active channel" we recommend that it be lined with CF-7 (coir fiber) erosion control matting (or equivalent), planted with live stake (cuttings) of the 1 species and density described in the planting details. This zone should be over seeded with the appropriate temporary and permanent grasses for the season. Repair Option 1 will include the construction (or grading) of a floodplain extending landward from the elevation break-point between the Lower and Mid- Bank Zones (Proposed Slope Break). The width of this bench will depend on the available area (based on landowner desires and site constraints) and the necessary fill volume. A minimum bench width of 5 to 10 feet is desired. However, the floodplain will likely be well in excess of this minimum along most of the repair reach. The back of this bench should then be graded and tied to the existing top of bank (terrace) elevation at a slope not greater than 3H:1 V as described below as the Mid-Bank Zone. The upstream and downstream ends of the bench will be graded to blend smoothly with the existing undisturbed banks. The Mid-Bank Zone should be similarly graded (or constructed) with the previously described materials at a slope not in excess of 3H:1 V to the approximate elevations described in the repair cross-section. As this zone is out of the "active channel", we recommend that it be lined with excelsior (wood fiber) erosion control matting (or equivalent) and planted with select trees and shrubs (bare root or containerized specimen) of the species and density described in the planting details. This zone should also be similarly over seeded with erosion control grasses. Where possible, transplanting of woody vegetation from on-site, including root mats, will be performed to assist in the stabilization of banks within the bench, Lower, and Mid-Bank Zones. NOTES: 1. The repair cross-sections shown are used to describe the repair cross- section are typical and intended to describe existing and repaired bank conditions at a location coincident with the measured field cross-section. ' 2. The vertical datum to which this is applied (existing top of bank) and the vertical and horizontal distances depicted in the repair cross-section are typical, however, there will be some variation and should therefore be verified and adjusted as necessary along the length of the repair reach. 3. The Proposed Top of Bank depicted on the Repair Plat defines the approximate location of the break between the Lower Bank Zone and the streantside edge of bench. ' 7 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. The Upper Bank Zone should be graded (or constructed) with the previously described materials such that it blends the Mid-Bank Zone with the surrounding floodplain grade to the approximate elevations described in the repair cross- section. As this zone is out of the "active channel", we recommend that it be lined with excelsior (wood fiber) erosion control matting (or equivalent) and be planted with select tree (bare root or containerized specimen) and shrubs of the species and density described in the planting details. This zone should also be similarly over seeded with erosion control grasses. 1 In-channel Structures As previously described, we recommend that the repaired channel banks be augmented with in-channel structures including rock (boulder) J-hook and rock cross-vanes. These structures will be utilized to reinforce and stabilize the proposed bank repairs. All structures will be constructed out of natural materials typically consisting of locally quarried boulders. The upstream side of these structures will be lined with a non-woven fabric and backfilled with excavated channel material and in some cases imported stone (off-site river bed borrow materials or other available coarse aggregate if approved by the designer) to improve stability and reduce the potential for piping. These in-stream structures concentrate stream energy toward the center of the channel and away from the near-bank areas. In doing so, the structure reduces shear stress along the banks and prevents bank erosion. (In this case, such structures allow for an additional measure of protection of the repaired bank until vegetation can take hold). This approach would also likely reduce the overall volume of stream stabilization material that must be hauled to the site and reduce 1 costs for the overall repair. The attached Repair Plan generally describes the number and type of in-channel structures to be installed. The designer will determine the exact spacing, length, and location of the in-channel structures at the time of construction. For planning purposes, we estimate that a minimum of five (5) rock (boulder) J-hook and three (3) rock cross-vane structures will be installed along the repair reach. A detail of a J-hook and cross-vane structures are shown in the Construction Drawings. Toe Stabilization Measures Depending on conditions encountered during construction, occasions may arise where supplemental stabilization of the bank toe is necessary. Where such conditions are encountered, banks would be reconstructed using rows of large boulders along the newly defined toe of the repaired bank. Footer rocks (boulders) and toe rocks (boulders) will be installed as shown in the details. In these cases, the landward side of these structures will be lined with a non-woven 1 geotextile fabric and backfilled with suitable material (off-site river bed borrow e 1 1 1 1 1 1 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. materials or other available coarse aggregate if approved by the designer). This material combination in conjunction with a more suitable slope (likely not in excess of 211:1 V) will improve stability and reduce the potential for future scour and piping (and resulting failure). The designer will determine the exact location and extent of toe stabilization measures at the time of construction. However, areas typically in need of such supplemental protection include areas of existing scour (where sub-grade reconstruction would be difficult), near existing large diameter trees (having experienced undercutting) which are to be maintained, and at the upstream and downstream repair limits (where tie-in to undisturbed banks is needed). For planning purposes, we have estimated that 2,100 linear feet of the repaired banks will require toe stabilization measures. In addition, the upper approximately 300 feet of the right bank (looking downstream), along the Section A repair, will require more significant toe stabilization (approximately 7-8 feet tall) as shown on the Construction Drawings. A detail of typical toe stabilization construction is shown on the Construction Drawings. Bank Plantings e 1 e e a e A riparian buffer area will be established along the repaired channel bank as part of the proposed Repair Plan. The riparian zone will include all three Bank Zones (Lower, Mid-, and Upper) and any constructed bench. These areas will be seeded and planted with the appropriate native riparian vegetation and will provide channel stability and treatment of surface waters traveling laterally through the buffer. Species will consist primarily of native trees and shrubs. The repaired bank will be planted with the appropriate channel bank species in the form of live stakes, bare-root seedlings (and containerized plants), and transplants where available. Native trees and shrubs that are available elsewhere on site will be removed with as much of the root ball intact and transplanted adjacent to the restored channel or in the floodplain. The majority of the planting efforts (with the exception of site transplants) should be delayed until the fall season to increase survivability. Vegetation will be supplied by locally identified plant sources or purchased from local, reputable nurseries. Other sources, outside of the local area, may be used depending on the availability of plant material and as approved by the designer. Tree and shrub species will be planted between the slope break (waterside of the floodplain bench and top of the lower bank zone) and the existing top of the bank. Tree and shrub species individuals will be planted randomly at a 50:50 mix with a 6 ft. by 6 ft. spacing in order to ensure a desired planting density of 1,200 stems per acre. This will increase the potential for the desired 5-year survivability. The planting plan will include a minimum of five of the nine tree species listed in the planting schedule. Plants shall be installed as shown in the planting details. Tree protection shelters shall be installed on all planted bare-root seedlings. The 9 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. planting plan will include a minimum of three of the seven shrub species listed in the planting schedule. Live stakes are specified and will be planted on a spacing of 3 ft. by 3ft. consisting of Black Willow, Silky Willow, and Silky Dogwood species randomly intermixed. Live stakes will be cut and installed as shown in the planting details. Representatives of S&EC and McGill Associates will be on site to observe and direct planting efforts associated with the buffer restoration. Substitution of tree, shrub, and live stake species must be approved in advance by the designer. Temporary and/or permanent seeding measures (German millet, rye grass, or the most appropriate erosion control grass as dictated by the season or region) will be applied to areas disturbed during grading operations to allow for localized stabilization while riparian species establish themselves. Construction Drawings for the proposed Stream Repair and Bank Stabilization Plan including the existing site conditions, the proposed repairs, a construction sequence, repair cross-sections, structure details, erosion and sediment control details, and a planting schedule and details are attached. Technical Specifications are also attached. 6. REGULATORY REQUIREMENTS 401 WATER QUALITY CERTIFICATION (Mandatory Requirement based on expected Certification conditions) - The following mandatory conditions apply to all repair sites: 1. Erosion & Sediment Control Practices 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 1 maintained on all construction sites, borrow sites, and waste pile (spoil) projects, including contractor-owned or leased borrow pits associated with the project. 1 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. 10 I J Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. d. The reclamation measures and implementation must comply with the reclamation in accordance with the requirements of the Sedimentation Pollution Control Act. 2. 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. ['I D g e J J i?? 7 L ?l L 3. 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. 4. 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. 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, unless authorized under Division of Land Resources Erosion and Sediment Control approval. 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. 6. 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. F i C e J D J D t Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. The channel must 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. Streambed materials are unstable in flowing-water situations and are unsuitable for bank stabilization. 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. 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 streambed materials are available. Berms are not permitted because they block the floodplain, constrict and accelerate flood flows, and often fail or impede drainage during large flood events. 9. 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. 10. 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. J a I 11. As long-term stream stability is a concern with this type of work, it is strongly recommended that woody vegetation be established along stream banks where possible. Any riparian vegetation planting should be performed in accordance with the Guidelines for Riparian Buffer Restoration. (littL)://ii2o.enr.state.nc.us/wEp/pdf/bLiffers.pdf) 12. Monitoring - The Permittee shall examine the stabilization work done under this Certification on an annual basis for three (3) years following the completion of the restoration efforts. This field evaluation should note the condition and stability of the measures installed and how well the repair is holding up. A written report must be provided to DWQ's Asheville Regional Office by June ls` of each year. The report must describe inspection results, include digital photographs, list the date of inspection, and describe any needed repairs or corrections. 12 Pressley-Liner - Stream Repairs & Bank Stabilization Plan July 2005 Haywood County Invitation # HC-102 McGill Associates, P.A. 13. The Permittee will provide on-site supervision of stability work including, but not limited to bank re-sloping, in-stream structure placement, and riparian zone re-establishment by an appropriately trained individual. 14. If pasture along the stream is to be used for grazing, the Permittee must inform the appropriate landowners that cattle should be prohibited from damaging riparian areas and from de-stabilizing the stream banks and channel. 15. Diffuse Flow - All constructed storm water 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. L. r a 0 1.1 ?t? I J L I. 16. Water Quality Certification Notifications - The Permittee must provide a copy of this issued Water Quality Certification and attached cover letter to each property owner where the approved work will be performed. 17. Turbidity Standard - The turbidity standard (Nephelometric Turbidity Units) shall not be exceeded as described in 15A NCAC 2B .0200. Appropriate sediment and erosion control practices must be used to meet this standard. Finally, pending receipt of a final 404 Permit and 401 Certification, copies of these issued documents and the associated conditions and comments provided by commenting agencies (when available) will be included in all final contractor packages that will be used for construction of the repairs. All regulatory requirements and the measures outlined in this document will be fully discussed with the chosen contractor and the inspectors for McGill and S&EC before any construction begins. During actual construction, inspectors will direct contractors to observe and apply good construction practices and the requirements described in this document. 1 13 CROSS-SECTIONS r Site # 15&16 Site Name PRESSLEY-LINER Date Collected 5/6/2005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 100.62 20 0+20 100.74 25 0+25 99.761tob 26 0+26 97.80 28 0+28 93.25 31 0+31 92.86 37 0+37 93.10 46 0+46 93.36 58 0+58 93.80 70 0+70 94.25 78 0+78 94.68 EOW - right 85 0+85 95.47 97 0+97 96.08 110 1+10 96.45 122 1+22 95.88 133 1+33 94.86 141 1+41 93.89 147 1+47 93.34 EOW - left 153 1+53 92.98 158 1+58 93.24 EOW - right 163 1+63 96.10 166 1+66 100.80 173 1+73 100.55 Cross Section # 1 105 100 95 c 0 90 LU 85 80 Typical Cross-section (Downstream End of Reach) Site #14 - Pressley-Liner Site i i I I Existing Edge of Water - Water Surface (Approx.) LOOKING DOWNSTREAM 0 20 40 60 80 100 120 140 160 180 Station (ft.) Site # 15&16 Cross Section # 2 Site Name PRESSLEY-LINER Date Collected 5/612005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 101.2842 10.92 0+11 102.4168 18.71 0+19 103.9964 22.7 0+23 104.156 TOB - left 24.53 0+25 100.7421 26.48 0+26 98.5602 27.42 0+27 97.8054 29 0+29 97.3557 EOW - left 31.63 0+32 96.7987 38.56 0+39 96.2908 43.28 0+43 95.7615 46.11 0+46 95.9761 50.22 0+50 96.5936 55.27 0+55 96.3837 63.19 0+63 96.4985 69.5 0+70 96.5071 75.91 0+76 96.2142 80.77 0+81 96.3203 90.5 0+91 96.5443 97.06 0+97 96.2079 103.08 1+03 95.9261 107.47 1+07 95.4119 109.63 1+10 95.9192 109.81 1+10 97.4299 EOW - right 109.9 1+10 99.2127 112.36 1+12 100.8167 116.01 1+16 101.7039 118.47 1+18 102.1972 120.87 1+21 103.3521 Typical Cross-section (Middle of Reach) Site #14 - Pressley-Liner Site 110 105 100 ? O 0 95 Existing Edge of W 90 Water - Water Surface (Approx.) 85 LOOKING DOWNSTREAM 80 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 1+10 1+20 1+30 Station (ft.) Site # 15&16 Cross Section # 3 Site Name PRESSLEY-LINER Date Collected 5/6/2005 Stream East Fork Pigeon River Dist. STA. Elevation Remarks 0 0+00 103.2309 2.66 0+03 102.4013 7.14 0+07 101.4384 11.85 0+12 100.7557 EOW -left 15.32 0+15 100.1745 21.08 0+21 99.7977 29.56 0+30 99.3728 34.57 0+35 98.5716 49.51 0+50 97.4006 52.82 0+53 99.5038 58.65 0+59 100.7782 EOW - right 65.37 0+65 102.8841 70.81 0+71 105.7202 74.58 0+75 107.8684 75.69 0+76 109.9448 76.94 0+77 111.7101 78.62 0+79 114.6395 TOB - right 83.6 0+84 114.2828 Typical Cross-section (Upstream End of Reach) Site #14 - Pressley-Liner Site 120 115 , 110 $ 105 100 tL 95 Existing Edge of Water- Water 90 Surface (Approx.) 85 LOOKING DOWNSTREAM 80 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 Station (ft.) t j 7 J LI D t 1500 1400 1300 1200 1100 W ? - 1000 O °n' ? 900 Q . o 0- W 800 a' 700 L ! 600 a) U) W 500 Q? C. 400 300 200 100 0 c 0 o n F1 U n TECHNICAL SPECIFICATIONS s a e s a t t TECHNICAL SPECIFICATIONS FOR STREAM REPAIRS & BANK STABILIZATION PROJECTS JULY, 2005 Prepared for: Haywood County, NC lilt 05 SEAL AL.- 24993 c r i co°ceao ?? 1 TITLE PAGE 1-1 C. 1 i7 'J J n H- i? P, TECHNICAL SPECIFICATIONS TABLE OF CONTENTS TABLE OF CONTENTS SECTION 1 - GENERAL REQUIREMENTS 1.1 SECTION INCLUDES 1 1.2 SUMMARY OF WORK 1 1.3 WORKFORCE EXPERIENCE 1 1.4 SPECIFIC EQUIPMENT REQUIREMENTS 1 1.5 MEASUREMENT AND PAYMENT 1 SECTION 2 - TEMPORARY FACILITIES 1 2.1 SECTION INCLUDES 1 2.2 MEASUREMENT AND PAYMENT 1 2.3 TEMPORARY SANITARY FACILITIES 1 2.4 BARRIERS 1 2.5 TRAFFIC CONTROL 1 2.6 STAGING AREA 1 2.7 COORDINATION WITH OWNER AND OTHER CONTRACTORS 2 2.8 PROTECTION OF EXISTING FACILITIES, STRUCTURES, AND SERVICES. 2 2.9 PROTECTION OF INSTALLED WORK 2 2.10 PROGRESS CLEANING & WASTE REMOVAL 2 2.11 EROSION CONTROL 2 2.12 FINAL CLEANING 2 SECTION 3 - QUALITY CONTROL 3 3.1 SECTION INCLUDES 3 3.2 MEASUREMENT AND PAYMENT 3 3.3 REFERENCES 3 3.4 CONSTRUCTION OBSERVATION 3 3.5 PLANTING OBSERVATION 3 SECTION 4 - SITE PREPARATION 4 4.1 SECTION INCLUDES 4 4.2 MEASUREMENT AND PAYMENT 4 4.3 UTILITY LOCATION AND PROTECTION 4 4.4 SEDIMENTATION AND EROSION CONTROL 4 4.5 CONSTRUCTION LAYOUT 4 4.6 CLEARING, GRUBBING, AND STRIPPING 4 4.7 DEWATERING 4 SECTION 5 - EXCAVATION 5 5.1 SECTION INCLUDES 5 5.2 MEASUREMENT AND PAYMENT 5 5.3 REFERENCES 5 5.4 PREPARATION 5 5.5 EXCAVATING 5 5.6 PLANTING PREPARATION 5 5.7 TOLERANCES 5 SECTION 6 - FILLING, BACKFILLING AND COMPACTION 6 6.1 SECTION INCLUDES 6 6.2 MEASUREMENT AND PAYMENT 6 6.3 REFERENCES 6 6.4 FILL MATERIALS 6.5 PREPARATION 6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION 6.7 COMPACTION AND QUALITY CONTROL 6.8 PROTECTION OF FINISHED WORK 6.9 TOLERANCES SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN- STREAM STRUCTURES 7.1 SECTION INCLUDES 7.2 MEASUREMENT AND PAYMENT 7.3 REFERENCES 7.4 GENERAL 7.5 MATERIALS 7.6 IN-STREAM STRUCTURES & TOE STABILIZATION 7.7 CHANNEL PROTECTIVE LININGS 7.8 SLOPE PROTECTION SECTION 8 - STREAM BANK PLANTING 8.1 SECTION INCLUDES 8.2 MEASUREMENT AND PAYMENT 8.3 REFERENCES 8.4 GENERAL 8.5 LIVE STAKES 8.6 PLANT SUBSTITUTION 8.7 PLANTING PREPARATION 8.8 STREAM BANK PLANTING 8.9 PLANTING PERIODS 8.10 REMOVAL OF NUISANCE VEGETATION 8.11 WATER FOR PLANTINGS 8.12 SUBMITTALS SECTION 9 - BUFFER PLANTING 9.1 SECTION INCLUDES 9.2 MEASUREMENT AND PAYMENT 9.3 REFERENCES 9.4 GENERAL 9.5 CONTAINER GROWN PLANTS 9.6 BARE ROOT PLANTS 9.7 PLANT SUBSTITUTION 9.8 PLANTING PREPARATION 9.9 PLANTING PERIODS 9.10 REMOVAL OF NUISANCE VEGETATION 9.11 WATER FOR PLANTINGS 9.12 SUBMITTALS SECTION 10 - PERMANENT SEEDING 10.1 SECTION INCLUDES 10.2 MEASUREMENT AND PAYMENT 10.3 REFERENCES 10.4 GENERAL 10.5 SEEDBED PREPARATION 10.6 SEEDING 10.7 SEEDING DATES 6 6 6 6 7 7 7 7 7 7 7 7 8 9 9 10 10 10 10 10 10 10 10 10 10 10 10 11 II 11 I1 11 11 12 12 12 12 12 12 12 12 13 13 13 13 13 13 13 13 1 ii 10.8 SOIL AMENDMENTS 13 11.5 SILT FENCE 14 10.9 MULCH 13 11.6 TEMPORARY SEEDING 14 SECTION I 1 - SEDIMENT & EROSION CONTROL 14 SECTION 12 - SITE MAINTENANCE 15 11.1 SECTION INCLUDES 14 12.1 SECTION INCLUDES 15 11.2 MEASUREMENT AND PAYMENT 14 12.2 MEASUREMENT AND PAYMENT 15 11.3 REFERENCES 14 12.3 EXECUTION 15 11.4 MATERIALS 14 G' p C I 111 SECTION I - GENERAL REQUIREMENTS SECTION 2 - TEMPORARY FACILITIES e t a 1 r 1.1 SECTION INCLUDES General requirements and information related to the work including, summary of work, measurement and payment, and reference to SPECIAL CONTRACT PROVISIONS. 1.2 SUMMARY OF WORK The Haywood County Stream Repairs and Bank Stabilization project consists of the earthwork construction of repaired and stabilized channel banks, in-channel structure installation, toe stabilization, and/or planting of the repaired channel banks and surrounding buffer area. Refer to the Construction Drawings and to these Specifications for project details. 1.3 WORKFORCE EXPERIENCE The Contractor is required to have the appropriately experienced personnel on site to operate equipment and insure that the construction sequence and installation procedures are followed as determined by the Engineer. Contractor personnel should be familiar with stream repair and bank stabilization techniques and the correct method of installing in-stream structures (i.e. rock cross-vanes). 1.4 SPECIFIC EQUIPMENT REQUIREMENTS The Contractor is required to have at a minimum two excavators with hydraulic thumbs during the entire course of construction unless otherwise approved by the Engineer. The hydraulic excavators must be of sufficient size to lift, manipulate, and install boulders larger than 5- foot by 4-foot by 3-foot (a maximum of 6 tons). 1.5 MEASUREMENT AND PAYMENT All measurement and payment for services performed shall be as indicated in the SPECIAL CONTRACT PROVISIONS. As such, they are not defined in these technical Specifications. END OF SECTION Stream Repairs & Bank Stabilization Haywood County Stream Repairs Page 1 2.1 SECTION INCLUDES Required temporary facilities including site access, temporary sanitary facilities, barriers, traffic control, construction staging area, Contractor coordination, protection of existing facilities and installed work, erosion control measures, and general site cleaning. 2.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 2.3 TEMPORARY SANITARY FACILITIES Provide and maintain required sanitary facilities and enclosures. No permanent sanitary facilities exist at the project site. 2.4 BARRIERS Provide barriers to prevent unauthorized entry to construction areas, to allow for Owner and Engineer access to site, and to protect existing structures and adjacent properties from damage due to construction operations. 2.5 TRAFFIC CONTROL Provide traffic control as required to protect the public safety. Conform to all requirements of State, County, City, or local laws and requirements for traffic control. Conformance with Contract Documents does not relieve the Contractor from responsibility for public safety. Construction operations may be underway on adjoining portions of the site. 2.6 STAGING AREA The Owner will designate an area for staging of Contractor's equipment and construction materials for the duration of construction. This area shall be maintained so as to provide a sightly appearance and a safe working environment. No other area shall be used for this purpose without the approval of the Owner. Storage of oil or fuel shall be confined to the construction staging area. Refueling of all vehicles and equipment shall occur only in the staging area. Refueling of non-mobile equipment located outside of the staging area will be allowed with Owner approval. No refueling shall occur within fifty feet of the channel or any other surface water or wetland. The Contractor shall take appropriate measures to ensure safe fueling procedures are followed. Contractor shall provide appropriate spill prevention measures. The Contractor shall provide a spill containment plan for both the staging area and the construction area. The plan shall include prevention, containment, and control of fuel or oil spillage from equipment storage, refueling, maintenance, and operation on site. The plan shall address both mobile and non-mobile equipment used during construction. Emergency spill cleanup equipment for oil and fuel spills shall be stored on site. The Contractor shall notify the Owner and all applicable agencies within 24 hours of any spill. Technical Specifications July 2005 2.7 COORDINATION WITH OWNER AND OTHER 2.12 FINAL CLEANING CONTRACTORS u 0 u n f r P replacement shall occur without additional cost to the Owner. Perform coordination with Owner and schedule work to ensure limited disruption of daily operations. Obtain approval from Owner prior to the disruption of any access to site utilities, structures, or locations. Coordinate the disruption of any utility services without regard to duration. Provide continuous representation/point of contact for Owner during all site activities. Access to construction site shall be limited to the entrance designated on the plans. Only access points approved by the Owner shall be used during construction. 2.8 PROTECTION OF EXISTING FACILITIES, STRUCTURES, AND SERVICES The project vicinity, including existing access routes, will continue to be used for daily operations by Owner and other contractors throughout the duration of the construction. The Contractor shall protect existing facilities, structures, and services throughout the duration of construction and provide special protection where specified in individual specification sections. Provide temporary and removable protection for existing structures and services. Control activity in immediate vicinity of facilities, structures, and services to prevent damage. Any facility, structure, or services disturbed or damaged, either intentionally or unintentionally, shall be removed and reinstalled or repaired to the Owner's satisfaction. Repairs to or replacement of facilities, structures, or services shall be performed at the expense of the Contractor. Repairs and/or replacement shall occur without additional cost to the Owner. 2.9 PROTECTION OF INSTALLED WORK Protect installed work and provide special protection where specified in individual specification sections. Provide temporary and removable protection for installed work and products. Control activity in immediate work area to prevent damage. Any installed work disturbed or damaged, shall be removed and reinstalled or repaired to the Engineer's satisfaction. Repairs to or replacement of installed work shall be performed at the expense of the Contractor. Repairs and 2.10 PROGRESS CLEANING AND WASTE REMOVAL Maintain areas free of waste materials, debris, and rubbish. Maintain site in a clean and orderly condition. Collect and remove waste materials, debris, and rubbish from site daily and dispose off site. Remove temporary utilities, equipment, facilities, and materials prior to Final Application for Payment inspection. Restore existing facilities used during construction to original condition. 2.11 EROSION CONTROL Contractor shall be responsible for preventing erosion on the site and sedimentation off the site. Methods shall be employed as recommended in the North Carolina Erosion and Sediment Control Planning and Design Manual, latest edition. Stream Repairs & Bank Stabilization Page 2 Haywood County Stream Repairs Execute final cleaning prior to final project assessment. Clean site and all installed work. Remove waste and surplus construction materials, rubbish, and construction facilities from the site. END OF SECTION Technical Specifications July 2005 I SECTION 3 - QUALITY CONTROL Section 9 (Wetland and Buffer Planting) of these Specifications. t L 0 U 1 U fJ 1 3.1 SECTION INCLUDES Observation of construction operations and buffer and stream bank planting. 3.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS. Unless indicated otherwise, the Owner will arrange and pay for initial planting observation for quality assurance. Re-observation testing required because of non-conformance to plans or Specifications shall be charged against any money owed to Contractor. Contractor is encouraged to perform quality control checks and testing at Contractor's expense to reduce the possibility of rejected work. 3.3 REFERENCES For products or workmanship specified by association, trade, or other consensus, comply with requirements of the standard, except when more rigid requirements are specified or are required by applicable codes. Conform to reference standard by date of issue on date of Contract Documents, except where a specific date is established by code. Section 6 (Filling, Backfilling, and Compaction) of these Specifications. Section 8 (Stream Bank Planting) of these Specifications. Stream Repairs & Bank Stabilization Haywood County Stream Repairs Page 3 3.4 CONSTRUCTION OBSERVATION The Owner has engaged the Engineer to observe construction operations as required in these Specifications. Reports (either verbal or written) shall be submitted concurrently to the Owner and Contractor, indicating observations and indicating compliance or non-compliance with Contract Documents. Observation of construction operations does not relieve Contractor of obligation to perform work to contract requirements. The Contractor shall allow observation personnel access to materials and the construction site as required. 3.5 PLANTING OBSERVATION The Owner has engaged the Engineer to observe stream bank and buffer planting as required in these Specifications. Reports will be submitted concurrently to the Owner and Contractor, indicating observations and indicating compliance or non-compliance with Contract Documents. Observation of planting operations does not relieve Contractor of obligation to perform work to contract requirements. The Contractor shall allow observation personnel access to materials (see stream bank plantings specified in Section 8) and the construction site as required. END OF SECTION Technical Specifications July 2005 1 M 0 T i I? tJ ?I '.I U SECTION 4 - SITE PREPARATION 4.1 SECTION INCLUDES Site preparation shall consist of utility location and protection, clearing, grubbing and stripping of the work area, and construction of any required temporary construction access routes and temporary sediment and erosion control measures. 4.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 4.3 UTILITY LOCATION AND PROTECTION The Contractor shall locate all existing utilities and mark them for identification. Contractor shall provide means for protecting utilities from any damage during site work. Repair of damaged utilities shall be at the Contractor's expense. Coordination should be made with Owner to locate and mark site specific utilities. NC ONE CALL (1-800-632- 4949) Contractor shall be responsible for preventing erosion on the site and sedimentation off the site. Methods shall be employed as recommended in the North Carolina Erosion and Sediment Control Planning and Design Manual, latest edition. 4.4 SEDIMENTATION AND EROSION CONTROL The Contractor shall control sedimentation runoff with methods approved by the Engineer during the course of construction of this Project. Depending on the magnitude of the clearing and grubbing associated with the project, an Erosion Control Plan may be required Temporary erosion and sediment control measures shall be installed as described in Section I 1 (Sediment & Erosion Control). The Contractor shall conform to all the rules, regulations, laws, and ordinances of the State of North Carolina, and of all other authorities having jurisdiction. 4.5 CONSTRUCTION LAYOUT The construction layout may include, but will not necessarily be limited to, channel disturbance limits, earthwork limits, and appropriate grading values. The Contractor is responsible for the construction surveying and layout. The Contractor is required to have a laser level or other equivalent equipment available on site during the entire period of construction. 4.6 CLEARING, GRUBBING, AND STRIPPING Conform to applicable codes for environmental requirements, disposal of debris, and erosion and sedimentation control as described above. Coordinate clearing work with utility owners and operators as described above. Establish a schedule for daily removal of debris from the site. Debris may not be stockpiled on site. Clear areas required for access to site and execution of work. Remove trees, stumps, other wood, metal, or rubble debris within work areas. Remove stumps, main root ball, and all roots with a diameter greater than 2 inches. Leave area in a clean and neat condition. Grade site surface daily to control the direction of channelized flow and prevent free standing surface water. ? I Stream Repairs and Bank Stabilization Page 4 Haywood County Stream Repairs In areas where bank repairs will be implemented, the existing top six inches of soil should be removed and stockpiled prior to excavation, construction, or reconstruction efforts. 4.7 DEWATERING Comply with all rules, regulations, laws, and ordinances of the State of North Carolina, and of all other authorities having jurisdiction. Provide, without additional cost to the Owner, all labor, materials, equipment, and services necessary to make the work comply with such requirements. Install all barriers, erosion and sedimentation control devices, silt fences, and other measures as required to prevent off-site sedimentation. Grade and ditch the site as necessary to direct surface runoff away from open excavations and subgrade surfaces. All water drained from the Work shall be disposed of in a manner that will not result in undue interference with other work or damage adjacent properties, other surfaces, structures, and utilities. All water due to the dewatering operation shall be legally disposed of in accordance with all applicable State and federal regulations and other applicable regulations. Under no circumstances shall fill be placed in excavations containing standing water without approval of the Engineer. END OF SECTION Technical Specifications July 2005 SECTION 5 - EXCAVATION 5.1 SECTION INCLUDES Provide all necessary equipment and labor to excavate for channel restoration without damage or interruption of utility service. 5.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 5.3 REFERENCES Occupational Safety and Health Administration - Construction Standards for Excavations, 29 CFR Part 1926.650-.652. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 5.4 PREPARATION Locate, identify, and protect utilities from damage as described in Section 4.3. Notify utility companies and coordinate for and/or install protection of utilities. 5.5 EXCAVATING Protect all utilities and structures that may be damaged by excavating ® work. ® In areas where stream and floodplain grading will be implemented, the existing top six inches of soil should be removed and stored prior to construction or reconstruction efforts. Perform Work in accordance with Occupational Safety and Health Administration (OSHA) - Construction Standards for Excavations, 29 CFR Part 1926.650-.652. Provide trench and excavation protection as required. Slope banks with machine to stable slope or flatter until shored. Grade top perimeter of excavation to prevent surface water from draining into excavation. Where required to protect utilities, perform excavation by hand. Remove subsoil, boulders, and rock as directed by the Engineer. Notify Engineer if subsurface conditions require excavation of larger subsoil, boulders, and rock, and discontinue Work. Engineer may direct adjustment in construction elevations. Adjustment of elevations shall not be a basis for additional payment. Correct areas over excavated in accordance with Section 6 (Filling, Backfilling, and Compaction) and as shown in the Construction Drawings. Stockpile select excavated material on-site for re-use in backfill. Stockpile location shall be subject to Owner approval. 5.6 PLANTING PREPARATION In areas where buffer planting will be implemented, the stockpiled topsoil and/or off-site topsoil (as required), should be distributed in preparation for restoration planting operations as described in SECTION 7 (Channel Protective Linings and In-stream Structures) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. All areas where topsoil is distributed shall be disked or harrowed to ensure soil aeration and to increase the surface roughness prior to planting. 5.7 TOLERANCES Top surface of channel protective lining (where applicable): Plus or minus one inch from required elevations. Top surface of fill, backfill, and topsoil: Plus or minus one inch from required elevations. END OF SECTION Stream Repairs and Bank Stabilization Page 5 Technical Specifications Haywood County Stream Repairs July 2005 SECTION 6 - FILLING, BACKFILLING AND COMPACTION 6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION n 6.1 SECTION INCLUDES Provide all necessary equipment and labor to perform filling, backfilling, and compaction necessary for construction of repaired channel banks, and other site work as shown on the Drawings without damage or interruption of utility service. Backfill areas to contours and elevations with unfrozen materials. Do not backfill over porous, frozen, or spongy subgrade surfaces. Employ a placement method that does not disturb or damage other work. Make gradual grade changes. Blend slope into level areas. Place backfill and fill in loose level lifts not to exceed six inches in thickness before compaction. Make gradual grade changes. Blend slope into level areas. u 7 J e P., n i lJ r F. g e ?I Replacement of removed topsoil shall be as described in SECTION 5.6 (Planting Preparation) of these Specifications. 6.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 6.3 REFERENCES ASTM D698 - Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures, Using 5.5 lb. Rammer and 12-inch Drop. ASTM D1556 - Test Method for Density of Soil in Place by the Sand-Cone Method. ASTM D2922 - Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth). ASTM D3017 - Test Methods for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth). ASTM D2487 - Classification of Soils for Engineering Purposes. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 6.4 FILL MATERIALS Soil excavated during construction and stockpiled may be re-used as fill provided that it can be conditioned and compacted as specified. Supplement or replace excavated soils with channel bed material or ordinary fill as shown on the Drawings and as needed to complete work. Fill for Lower-Bank Zone shall consist of channel bed material from an approved borrow source. Ordinary fill for Mid-Bank and Upper-Bank Zones shall be any soil classified as SM, SC, SP-SM, SP- SC, SC-SM, SP, or SW under ASTM D2487 unless otherwise directed by the Engineer. If soil excavated during cut operations is not re-used, it shall be removed from the site to an appropriate disposal facility at no additional charge to Owner. The Contractor shall be responsible for the payment of all fees associated with transportation and disposal of unusable materials. Suitable borrow material may be available within the vicinity of the project site but must be identified by the Contractor and approved by the Engineer. 6.5 PREPARATION Compact subgrade to density requirements for subsequent backfill materials. Cut out soft areas of subgrade not capable of compaction in place. Backfill with ordinary fill material and compact to density equal to or greater than requirements for subsequent fill material. Earth fill in repaired channel banks and other structures shall be placed so as to meet the following additional requirements: a. The distribution of materials throughout each zone shall be essentially uniform and the fill shall be free from lenses, pockets, streaks, or layers of material differing substantially in texture or gradation from the surrounding materials. b. Backfill areas to contours and elevations with unfrozen materials. Do not backfill over porous, frozen, or spongy subgrade surfaces. Employ a placement method that does not disturb or damage other work. Place backfill and fill in loose level lifts not to exceed six inches in thickness before compaction. Make gradual grade changes. Blend slope into level areas. c. If the surface of any layer becomes too hard and smooth for proper bond with the succeeding layer, it shall be scarified parallel to the axis of the fill to a depth of not less than 2 inches before the next layer is placed. d. The top surfaces of embankments shall be maintained approximately level during construction, except that a crown or cross-slope of not less than 2% shall be maintained to insure effective drainage, and except as otherwise specified for drain fill zones. e. Repaired channel banks shall be constructed so that the slope of the bonding surfaces between embankment in place and embankment to be placed is not steeper than 2 feet horizontal to I foot vertical, unless otherwise specified on the Contract Drawings. New embankment material shall be benched into existing slope as shown on the plans. Short bench levels shall be formed to a slope of 2H: IV or flatter, based on existing slope conditions as determined by the Engineer at the time of construction, unless otherwise specified on the Contract Drawings. Benching shall be constructed in such a fashion as to inhibit the formation of preferential planes of slope failure. The bonding surface of the embankment in place shall be stripped of all loose material, and shall be scarified, moistened and recompacted when the new fill is placed against it as needed to insure a good bond with the new fill and to obtain the specified moisture content and density in the junction of the in-place and new fill. Any variation to this method of tying new fill into the existing filled bank shall be determined in the field at time of construction by the Engineer. 6.7 COMPACTION AND QUALITY CONTROL For backfill operations, compaction shall be performed using tracked equipment as directed by the Engineer. Compaction greater than that provided by tracked equipment may be deemed necessary by the Engineer based on site or soil conditions. Provide compaction as directed by the Engineer. Lift thickness shall not exceed 6". Stream Repairs and Bank Stabilization Page 6 Technical Specifications Haywood County Stream Repairs July 2005 U a t t e I 6.8 PROTECTION OF FINISHED WORK Protect finished work. Reshape and re-compact fills subjected to vehicular traffic or damaged by erosion. 6.9 TOLERANCES Top surface of channel protection lining (where applicable): Plus or minus one inch from required elevations. Top surface of fill, backfill, and topsoil: Plus or minus one inch from required elevations. Top surface of floodplain (where applicable): Plus or minus one inch from required elevations. END OF SECTION SECTION 7 - CHANNEL PROTECTIVE LININGS AND IN- STREAM STRUCTURES 7.1 SECTION INCLUDES Temporary and permanent channel erosion protective linings and in- stream rock and log structures. 7.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 7.3 REFERENCES The following specifications and methods form a part of this Specification: ASTM C88 - Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate ASTM C127 - Standard Test Method for Specific Gravity and Absorption of Coarse Aggregate NCDOT - Standard Specifications for Roads and Structures. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 7.4 GENERAL A Channel Protective Lining has been selected along channel banks. In-stream Structures will be installed to provide additional bank protection where shown on the Drawings. Materials to be used in Channel Protective Linings and the In-Stream Structures are specified in this section. Channel erosion protection linings shall be constructed of the materials specified in this section and as shown on the Drawings. Linings shall be laid true to the grade shown on the Drawings. Linings shall make a smooth interface with the surrounding grade. Any portion of the lining which has its grade or surface disturbed after placement shall be repaired. Any portion thereof already in place which is found to be defective or damaged shall be repaired or replaced, as directed by the Engineer, without additional cost to the Owner. The in-stream structures shall be constructed of the materials specified in this section and as shown on the Drawings. Any portion of the structure which is disturbed after placement shall be repaired. Any portion of the structure found to be defective or damaged shall the repaired or replaced, and directed by the Engineer, without additional cost to the Owner. 7.5 MATERIALS Materials include excelsior and coir fiber matting manufactured especially for erosion control, Eco-Stakes, wire staples, nonwoven geotextile, boulders, channel bed material, NCDOT Coarse Aggregate Size 957, NCDOT Class A Erosion Control Stone, NCDOT Class B Erosion Control Stone, NCDOT Class 1 Rip Rap (RipRap), and NCDOT Class 2 Rip Rap (RipRap). Matting for erosion control in areas other than stream banks with mild slopes shall be excelsior matting. Excelsior matting shall consist of a machine produced mat of curled wood excelsior that is a minimum of Stream Repairs and Bank Stabilization Page 7 Technical Specifications 1 Haywood County Stream Repairs July 2005 7 si f?l ,II 1 iL' t C? I =,1 -I L:J a I`t J I• j J 47 inches in width. The mat shall weigh 0.975 pounds per square yard with a tolerance of plus or minus 10 percent. At least 80 percent of the individual excelsior fibers shall be 6 inches or more in length. The excelsior fibers shall be evenly distributed over the entire area of the blanket. One side of the excelsior matting shall be covered with an extruded plastic mesh. The mesh size for the plastic shall be a maximum of V x V square. Matting for erosion control shall not be dyed, bleached, or otherwise treated in a manner that will result in toxicity to vegetation: Other acceptable material manufactured especially for erosion control may be used when approved by the Engineer in writing before being used. Erosion control matting for stream banks shall be CF 7 coin matting. Matting shall be 100% coir fiber. Minimum Specifications for coir matting as follows: Weight Thickness Water Velocity Grab/Elongation (Dry) Manning's n Max Shear Stress 20.6 oz/yd2 (700 g/m2) ASTM-D3776 6.34 mm 10 ft/s I I5.8lbs/23.9% MD ASTM-D4594 54. I lbs/33.5% XD 0.0294 4.46 lb/ft2 Nonwoven Geotextile: Geotextile shall be a nonwoven fabric with a minimum weight of 12 ounces per square yard (ASTM D3776), a minimum grab strength in either direction of 180 pounds (ASTM D4632), a minimum puncture resistance of (ASTM D4833) of 85 pounds, and permeability of (ASTM D4491) greater than 0.2 cm/sec. Fabric meeting these Specifications shall still be subject to approval or rejection by the Engineer. At the time of installation, the fabric will be rejected if it has defects, rips, holes, flaws, deterioration, or damage incurred during the manufacture, transportation, or storage. NCDOT Coarse Aggregate Size #57: Shall conform to gradation requirements of Table 1005-1, NCDOT Specifications. NCDOT Class A Erosion Control Stone: 2 to 6-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards (No more than 5% of the material furnished can be less than the minimum size specified, nor more than 10% of the material can exceed the maximum size specified). Concrete rubble shall not be used. NCDOT Class B Erosion Control Stone: 5 to 12-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards (No more than 5% of the material furnished can be less than the minimum size specified, nor more than 10% of the material can exceed the maximum size specified). Concrete rubble shall not be used. NCDOT Class 1 Rip Rap (RipRap): 5 to 17-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards. The stone shall vary in weight from 5 to 200 pounds with 30% weighing a minimum of 60 pounds each and 10% weighing a minimum of 15 pounds each. (No more than 5% of the material furnished can be less than the minimum size specified, nor can more than l0% of the material exceed the maximum size specified). The rock fragments shall be angular to subrounded in shape. Concrete rubble shall not be used. NCDOT Class 2 Rip Rap (RipRap): 9 to 23-inch, widely graded, durable, crushed stone conforming to applicable NCDOT standards. The stone shall vary in weight from 25 to 250 pounds and 60% shall weigh a minimum of 100 pounds each. (No more than 5% of the material furnished can be less than the minimum size specified, nor can more than 10% of the material exceed the maximum size specified). The rock fragments shall be angular to subrounded in shape. Concrete rubble shall not be used. Boulders (Toe Stabilization and Footer Rocks): Boulders of approximate dimension 6' x 3' x 2' shall be individually picked by Contractor from the quarry or the on site stockpile for use in in-stream structure construction. Boulders as small as 4' x 2' x 2' may be used; however, they shall not constitute more than 30% of the total boulders. Boulders shall be relatively flat on either side in the same dimension, preferably the long dimension and must have smooth ends. 7.6 IN-STREAM STRUCTURES & TOE STABILIZATION The work covered by this section consists of the construction of in- stream structures including rock vane arms, J-hooks, cross-vane structures, and rock toe stabilization. The quantity of in-stream structures and length of toe stabilization to be constructed will be affected by actual conditions that occur during the construction of the project. The type and quantity of structures may be increased or decreased at the direction of the Engineer. Such variations in quantity will not be considered as alterations in the details of construction or a change of character of the work. A tracked hydraulic excavator with a thumb of sufficient size to move specified boulders is required for this item. Precise placement of structures will be determined during construction by the Engineer and may not reflect the construction Drawings. In-stream structures and toe stabilization installed must be inspected and approved by the Engineer. Excavation for the purpose of installation is incidental and is covered by this line item. The excavation of the subgrade and installation will be consecutive and continuous. Once the installation procedure has been initiated, it will be completed before the end of the workday. Any incidental/accidental discharge of sediment accumulation as a result of the installation procedure will be removed or integrated into the designed bedform. Excavation shall terminate at bedrock if contacted prior to the design grade. Bedrock will be excavated only if it is determined to. be rippable and necessary by the Engineer. Install toe stabilization as shown on the Drawings and and as directed by the Engineer. Grade area where toe stabilization is to be constructed. Surface shall be free of obstructions, debris, and pockets of soft or low density material. Unless otherwise directed by the Engineer, the stone shall be placed on the slope and/or angle as indicated on the plans. The stone shall be graded so that the smaller stones are uniformly distributed throughout the mass. The Contractor may place the stone by mechanical methods provided that when the work is completed, it forms a properly graded, dense, neat layer of stone. Place rock vane arms as shown on the Drawings. Footer rocks shall be installed to define shape of in-stream rock structures. Footer rocks shall be installed such that their long dimension is oriented in the direction of flow. No gaps shall be left between footer rocks. Minimum footer rock depth below the proposed ground surface of the stream bed shall be 4 feet. Rock sills shall extend a minimum of 3 feet beyond bankfull (perpendicular to stream flow) as indicated on plans. Stream Repairs and Bank Stabilization Page 8 Technical Specifications Haywood County Stream Repairs July 2005 Geotextile shall be placed over structures and backfilled with aggregate inches with the upper matting overlapping the lower matting. Vertical as shown on plans. overlaps in matting shall be a minimum of 12 inches. 7 I'] 7.7 CHANNEL PROTECTIVE LININGS Grade the area to be lined. Surface shall be free of obstructions, debris, and pockets of soft or low density material. The rock weir structures shall be completed prior to installation of the channel protective linings. Cover area with all available on-site stockpiled topsoil to a preferred minimum depth of 4 inches. Final grade with topsoil shall be as shown on Drawings. Topsoil shall be prepared with fertilizer and lime, and seeded as described in Section 10 (Permanent Seeding) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. Install CF-7 erosion control matting perpendicular to the axis of the stream. The matting shall be laid smooth and free from tension, stress, folds, wrinkles and creases. Horizontal overlaps shall be a minimum of 12 inches with the upper matting overlapping the lower matting. Vertical overlaps in matting shall be a minimum of 12 inches with the upstream matting overlapping the downstream matting. The top (crest) and bottom (toe) edges of the matting shall be anchored in trench at least 12 inches deep as shown on Drawings to prevent undercutting of the matting. Matting trench and wire staples shall be constructed and installed as shown on Drawings. Wire staples shall be installed not more than 3 feet apart (3' on centers) and staggered, with a minimum of 3 stakes per square yard of matting over the entire lined area. Staples shall be driven perpendicular to the soil surface. Staples shall be driven flush with soil surface to reduce potential for movement of the erosion control matting. Staples shall be installed in parallel rows on 3' centers and in trenches at the top and bottom of the slope as shown on Drawings. Along all laps (both vertical and horizontal) in the matting, install a common row of staples at the scam, installing staples on 1 foot ( 12 inch) centers. All standard anchoring staples shall be 18 inches in length. Staples shall be driven in with a wooden mallet. Care shall be taken to avoid damage to matting material. F CI L 11 t The top (crest) edge of the matting shall be anchored in trench at least 12 inches deep as shown on plans to prevent undercutting of the matting. The trench should be located a minimum of 12 inches from the top of bank, and shall not alter channel or floodplain grade. Matting trench and Eco-Stakes® shall be installed as shown on Drawings. Matting shall be anchored utilizing Eco-staked brand stakes installed not more than 3 feet apart (3' on centers) and staggered, with a minimum of 3 stakes per square yard of matting over the entire lined area. 24-inch Eco-stakes shall be used along the toe of the channel and 12-inch stakes shall be used within the field and top edge of the matting as detailed on the Construction Drawings. Along all laps (both vertical and horizontal) in the matting, install a common row of staples at the scam, installing staples on I foot (12 inch) centers. Along the toe, 24 inch Eco-StakesO shall be spaced not more than 2 feet All stakes shall be driven perpendicular to the axis of the stream as shown on Drawings. Care shall be taken to avoid damage to matting material. In the event that the matting is displaced or damaged during installation, the matting shall be repositioned or replaced. This will be done at no additional cost to the Owner. 7.8 SLOPE PROTECTION Grade area to be lined. Surface shall be free of obstructions, debris, and pockets of soft or low density material. Cover area with all available on-site stockpiled topsoil to a preferred minimum depth of 4 inches. Final grade with topsoil shall be as shown on Drawings. Topsoil shall be prepared with fertilizer and lime, and seeded as described in Section 10 (Permanent Seeding) of these Specifications. The Contractor is ultimately responsible for establishing a suitable planting medium with a minimum depth of six (6) inches. Install excelsior matting perpendicular to slope. Matting shall be unrolled with netting material on top and blanket material in contact with the soil. (Note: some excelsior matting has netting on both sides.) The matting shall be laid smooth and free from tension, stress, folds, wrinkles and creases. Horizontal overlaps shall be a minimum of 12 In the event that the matting is displaced or damaged during installation, the matting shall be repositioned or replaced. This will be done at no additional cost to the Owner. END OF SECTION Stream Repairs and Bank Stabilization Page 9 Technical Specifications Haywood County Stream Repairs July 2005 SECTION 8 - STREAM BANK PLANTING and handled in a manner that will prevent injury, drying out, or freezing. n E P-, r L 4 F 11 C C r 8.1 SECTION INCLUDES Provide all necessary equipment and labor to implement stream bank planting plan. 8.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 8.3 REFERENCES The following specifications and methods form a part of this Specification: NCDOT - Standard Specifications for Roads and Structures. 15 NCAC 213.200 - Classification of Water Quality Standards Applicable to Surface Waters & Wetlands of North Carolina The Baily Hortorium (1976 MacMillan Publishing Co., Inc.) American Standard for Nursery Stock, latest edition NCDENR - Erosion and Sediment Control Planning and Design Manual When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 8.4 GENERAL All plants shall be as called for by these Specifications and shown on the Drawings. Botanical names referred to in the Drawings are taken from "Hortus Third", the Baily Hortorium (1976 MacMillan Publishing Co., Inc.). All plants delivered shall be true to name. Each plant, or group of the same species, variety, and size of plant, shall be legibly tagged with the name and size of the plant. 8.6 PLANT SUBSTITUTION No change in the specified plants (species, variety, size, caliper, furnish, etc.) will be made without written approval of the Engineer. All requests by the Contractor for substitutions shall be presented in writing and shall include a listing of the sources which have been contacted in an attempt to secure the specified plant material. Requests for substitutions shall include botanical name, common name, size, caliper, and furnish description of the proposed substitute. No increase in compensation will be made to the Contractor as a result of the use of the approved substitute plants. 8.7 PLANTING PREPARATION In areas where stream restoration will be implemented, preparation for restoration planting operations shall be as described in SECTION 7 (Channel Protective Linings) of these Specifications. Where live stakes shall be planted, through the Channel Protective Lining, holes shall be made by neatly punching a hole in the matting with a dibble bar (a heavy metal tool with a blade and a foot petal). The dimensions of the hole shall not exceed 3" in any direction and shall not damage the surrounding matting. 8.8 STREAM BANK PLANTING Where live stakes shall be planted, they shall be installed at a 45 to 60 degree angle in the direction of stream flow. The buds of stakes and plant cuttings should point upward and about 2 inches of wood should be exposed above the ground surface. Tamp the surrounding soil firmly to eliminate air pockets. Where stream bank planting is directed, areas shall be planted with trees and shrubs, randomly intermixed with a 50:50 split, using 6-foot by 6-foot centers as shown on the Construction Drawings. All plants shall be first-class representatives of their species. Stakes shall be reasonably straight. All plants shall be free from plant diseases and insect pests. All shipments of plants shall comply with all nursery inspection and plant quarantine regulations of the States of origin and destination, as well as with Federal regulations governing interstate movement of stock. If stock from other States is used, the stock shall be accompanied by a tag or certificate stating, in effect, that the stock has been inspected and certified by an authorized official of the State of origin as apparently free from injurious plant pests. All plants shall be subject to inspection at any time by the Engineer. Any such inspection before or during planting operations, however shall not be construed as final acceptance of the plants involved. 8.5 LIVE STAKES Live stakes, if approved for use by the Engineer, shall consist of freshly cut live plants of select stock which has been developed by proper cultural treatment. Stakes and cuttings shall be 3/8" to 1/2" diameter and between 12 and 18 inches long. They shall be carefully cut from mother-stock plantings. Plant materials shall be packaged, transported, Stream Repairs and Bank Stabilization Page 10 Haywood County Stream Repairs Care should be taken to avoid planting stakes too deep or too shallow, and to avoid damage to stakes during planting. Planting depth should be in accordance with listed references and supplier recommendations. 8.9 PLANTING PERIODS The installation of live stakes, bare root, or container grown plants shall be performed between October 1 and November 15, 2005. However, planting can not begin until all stream repairs have been completed. 8.10 REMOVAL OF NUISANCE VEGETATION Removal or control of nuisance vegetation shall be performed for a period of 90 days as necessary to ensure adequate survival of specified plant species. See SPECIAL CONTRACT PROVISIONS. 8.11 WATER FOR PLANTINGS The Contractor shall install a rain gage and collect daily gage readings at the site. Contractor shall provide initial watering on the day of planting and thereafter at a minimum rate of I inch per week (including rainfall) for a period of 90 days. Water used in the planting or care of Technical Specifications July 2005 u n 7 D D i t 7 n vegetation and plantings shall meet the requirements of Class C fresh waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT PROVISIONS. 8.12 SUBMITTALS Contractor shall submit purchase certificates (or other proof) of all species planted. END OF SECTION SECTION 9 - BUFFER PLANTING 9.1 SECTION INCLUDES Provide all necessary equipment and labor to implement buffer planting plan. 9.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 9.3 REFERENCES The Baily Hortorium (1976 MacMillan Publishing Co., Inc.) American Standard for Nursery Stock, latest edition NCDENR - Erosion and Sediment Control Planning and Design Manual 15 NCAC 213.200 - Classification of Water Quality Standards Applicable to Surface Waters & Wetlands of North Carolina The following specifications and methods form a part of this Specification: NCDOT - Standard Specifications for Roads and Structures. When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 9.4 GENERAL All plants shall be as called for by these Specifications. Bare rooted plants may be used in lieu of container grown plants provided written approval for such use has been obtained from the Engineer. Grading of plants, type and minimum dimensions of containers shall conform to the Specifications contained in the latest edition of American Standard for Nursery Stock. Plants shall not be cut back from larger sizes to meet sizes called for on the Drawings. Botanical names referred to in the Drawings are taken from "Hortus Third", the Baily Hortorium (1976 MacMillan Publishing Co., Inc.). All plants delivered shall be true to name. Each plant, or group of the same species, variety, and size of plant, shall be legibly tagged with the name and size of the plant. All plants shall be first-class representatives of their species. The root system shall be vigorous and well-developed. The branch systems shall be of normal development, and free from disfiguring knots, sun scald injuries, abrasions of the bark, dead or dry wood, broken terminal growth; or other objectionable disfigurements. Trees shall have reasonably straight stems, and shall be well branched and symmetrical in accordance with their natural habits of growth. All plants shall be free from plant diseases and insect pests. All shipments of plants shall comply with all nursery inspection and plant quarantine regulations of the States of origin and destination, as well as with Federal regulations governing interstate movement of nursery stock. If nursery stock from other States is used, the stock shall be accompanied by a tag or certificate stating, in effect, that the nursery stock has been inspected and certified by an authorized official of the State of origin as apparently free from injurious plant pests. All plants shall be subject to inspection at any time by the Owner, Stream Repairs and Bank Stabilization Page I 1 Technical Specifications Haywood County Stream Repairs July 2005 Engineer, or a party to be named by the Owner. Any such inspection before or during planting operations, however shall not be construed as final acceptance of the plants involved. 9.5 CONTAINER GROWN PLANTS Container grown plants shall be healthy, vigorous, well-rooted, and shall have become established in the container in which they are delivered. These plants shall have been in the established container long enough for the fibrous roots to have developed so that the root mass will retain its shape and hold together when removed from the container. The container shall be a 1 gallon container or larger, sufficiently rigid to firmly hold the soil protecting the root during transporting, handling, and planting, and the soil shall not be allowed to become frozen. 9.6 BARE ROOT PLANTS Bare root plants, if approved for use by the Engineer, shall have a heavy fibrous root system which has been developed by proper cultural treatment. They shall be dug, packaged, transported, and handled in a manner that will prevent injury to or drying out of the trunks, branches, or roots, or freezing of the roots. 9.1 PLANT SUBSTITUTION No change in the specified plants (species, variety, size, caliper, furnish, etc.) will be made without written approval of the Engineer. All requests by the Contractor for substitutions shall be presented in writing and shall include a listing of the sources which have been contacted in an attempt to secure the specified plant material. Requests for substitutions shall include botanical name, common name, size, caliper, and furnish description of the proposed substitute. No increase in compensation will be made to the Contractor as a result of the use of the approved substitute plants. 9.8 PLANTING PREPARATION In areas where wetland and buffer planting will be implemented, preparation for planting operations shall be as described in SECTION 5.6 (Planting Preparation) of these Specifications. Where container grown plants will be planted, holes made in preparation for tree and shrub species planting shall be as shown on the Construction Drawings. Bare root plants and container-grown plants shall be planted in holes made by neatly punching a hole through slope protection matting and into existing grade with a dibble bar (a heavy metal tool with a blade and a foot petal). The dimensions of the hole shall not exceed 3" in any direction. 9.9 PLANTING PERIODS The installation of bare root and container grown plants shall be performed between October I and November 15, 2005. However, planting can not begin until all stream repairs have been completed. 9.10 REMOVAL OF NUISANCE VEGETATION Removal or control of nuisance vegetation shall be performed for a period of 90 days as necessary to ensure adequate survival of specified plant species. See SPECIAL CONTRACT PROVISIONS. 9.11 WATER FOR PLANTINGS The Contractor shall install a rain gage and collect daily gage readings at the site. Contractor shall provide initial watering on the day of planting and thereafter at a minimum rate of 1" per week (including rainfall) for a period of 90 days. Water used in the planting or care of vegetation and plantings shall meet the requirements of Class C fresh waters as defined in 15 NAC 213.200. See SPECIAL CONTRACT PROVISIONS. 9.12 SUBMITTALS Contractor shall submit purchase certificates (or other proof) of all species planted. END OF SECTION Stream Repairs and Bank Stabilization Page 12 Technical Specifications Haywood County Stream Repairs July 2005 SECTION 10 -PERMANENT SEEDING be used and erosion control matting shall be placed within 24 hours of seeding. Apply seeds and mulch at the rates indicated below. 10.1 SECTION INCLUDES Areas with Channel Protective L inings: Permanent seeding for permanent site stabilization. Species Rate flbslacre) 10.2 MEASUREMENT AND PAYMENT Creeping Red Fescue 80 (Festuca niba rubs) See SPECIAL CONTRACT PROVISIONS Redtop 15 (Agrostis stolonifera L.) 10.3 REFERENCES Kentucky bluegrass 15 (Poa pratensis L.) The following specifications and methods form a part of this Rye (grain) Grass 15 Specification: i (Secale cereale) gn NCDENR - Erosion and Sediment Control Planning and Des All other disturbed areas: Manual Species Rate Rbs/acre) s When the Specifications or Drawings differ from the requirements of Creeping Red Fescue 80 the above-referenced documents, the more stringent requirements shall (Festuca Tuba Tuba) apply. Redtop 15 (Agrostis stolonifera L.) 10.4 GENERAL Kentucky bluegrass 15 Permanent seeding shall be executed in temporary lined areas and all (Poa pratensis L.) other areas which are disturbed during construction activities. In areas Rye (grain) Grass 15 where Channel Protective Lining will be installed, seedbed preparation (Secale cereale) and seeding shall be performed prior to the placement of erosion Mulch Rate fibs/1000 so. ft.) control matting (See SECTION 7 - Channel Protective Linings). Grain Straw 70 10.5 SEEDBED PREPARATION Complete grading before topsoiling or preparing seedbeds. Avoid creating steep slopes. Excess stockpiled topsoil not used in construction of Channel Protective Lining shall be redistributed across areas to be seeded. Where topsoil is unavailable, seedbeds may be prepared directly on the exposed finished grade or topsoil may be imported. If topsoil is used, it should be spread to a uniform depth of four to six inches and bonded to the subsoil by loosening with a disc, harrow, or chisel plow. Areas where seeding will occur on exposed finished grade shall be disked or harrowed to ensure soil aeration and to increase the surface roughness prior to planting. Apply lime and fertilizer evenly across seedbed and work into the top 4-6 inches of soil by discing or other suitable means. Operate machinery on the contour. Rework the surface if soil becomes compacted or crusted prior to seeding. Complete seedbed preparation by breaking up large clods and raking into a smooth, uniform surface. Fill in or level depressions that can collect water. 10.6 SEEDING 10.7 SEEDING DATES Seeding dates given in these Seeding Specifications have the best probability of success. Rest Possible Late winter 15 Feb-15 Mar 1 Dec-15 Mar Late Fall I Sept-30 Sept 1 Oct-30 Nov Seeding shall. be completed within the "possible" range of dates. 10.8 SOIL AMENDMENTS Apply lime and fertilizer according to soil tests, or apply 2 tons/acre (4,000 lb/acre) ground agricultural limestone and 1,000 lb/acre 5-10-10 fertilizer, or as directed by the Engineer. 10.9 MULCH Apply grain straw, or equivalent cover of another suitable mulching material as described above. Anchor mulch by roving or netting. Netting shall be used on slopes steeper than 2H:1 V. END OF SECTION Apply permanent seeding to seedbed after preparation is complete. Use certified seed for permanent seeding whenever possible. Certified seed is inspected by the North Carolina Crop Improvement Association. It meets published North Carolina Standards and should bear an official "Certified Seed" label. Broadcast seed into a freshly loosened seedbed that has not been settled by rainfall. Mulch must be used on slopes 4H:1 V or steeper and in areas when concentrated water may flow. Anchor mulch with netting in areas subject to concentrated flow. In areas where Channel Protective Lining will be installed, no mulch shall Stream Repairs and Bank: Stabilization Page 13 Haywood County Stream Repairs Technical Specifications July 2005 J 7 J 0 SECTION I I - SEDIMENT & EROSION CONTROL 11.1 SECTION INCLUDES Installation of temporary sediment and erosion control measures to include installation of silt fence and temporary seeding measures. The Contractor shall maintain these measures to ensure proper structure function and vigorous temporary vegetative cover during construction. 11.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 11.3 REFERENCES The following specifications and methods form a part of this Specification: ASTM D4355 - Standard Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus) ASTM D4632 - Standard Test Method for Grab Breaking Load and Elongation of Geotextiles ASTM D4751 - Standard Test Method for Determining Apparent Opening Size of a Geotextile NCDENR - Erosion and Sediment Control Planning and Design Manual When the Specifications or Drawings differ from the requirements of the above-referenced documents, the more stringent requirements shall apply. 11.4 MATERIALS Silt Fence: Silt fence shall have steel posts, woven wire fabric, and filter fabric. The steel post shall have a minimum length of 5' and minimum width of 1 3/4". The steel posts shall have projections for fastening the wire to the fence. The woven wire fabric shall be at lest 32 inches high, and shall have at least 6 horizontal wires. Vertical wires shall be spaced a maximum of 12 inches apart. The top and bottom wires shall be at least 10 gauge. All other wires shall be at least 12%: gauge. The silt fence filter fabric shall meet the following minimum criteria: Grab Tensile Strength 100 lbs. Grab Tensile Elongation 15 % UV Resistance 70% Apparent Opening Size (AOS) 20 (US Sieve) 11.5 SILT FENCE The Contractor shall provide all labor, materials, tools and other items necessary to furnish and install the silt fence as shown on the Drawings and specified herein. The silt fence shall be placed following the contours as closely as possible. The ends of the silt fence shall be turned uphill. The posts shall not exceed a spacing of 8 feet. The posts shall be driven into the ground and shall extend above ground as shown on the Drawings. The filter fabric shall be stapled or wired to each post. The filter fabric shall extend into the ground as shown in the Drawings. Stream Repairs and Bank Stabilization Page 14 Haywood County Stream Repairs If possible, the filter fabric shall be cut from a continuous roll to avoid the use of joints. When joints are necessary, securely fasten the filter cloth only at a support with overlap to the next post. Silt fences shall be inspected weekly and after each significant storm (1 inch in 24 hrs.). Any required repairs shall be made immediately. Sediment shall be removed when it reaches 1/3 the height of the fence or 9 inches maximum. Dispose of the sediment in the designated disposal area. 11.6TEMPORARY SEEDING The Contractor shall provide all labor, materials, tools, and other items necessary to provide temporary seeding in accordance with State and local Standards. Areas where no substantial or significant progress is made for more than 15 days shall be temporarily seeded as shown on the Drawings and specified herein. All areas must be seeded, mulched, and anchored unless written approval is granted by the Owner. Incidental grading shall not constitute substantial or significant progress in construction activity. Seeding and mulching shall be done immediately following construction. All disturbed areas shall be dressed to a depth of 8 inches. The top 3 inches shall be pulverized to provide a uniform seedbed. Agricultural lime shall be applied at a rate of 2,000 pounds per acre immediately before plowing. Grass seed shall be applied at the following rate: Tyne Dates Possible Rate Rye (Grain) Aug. 15 - May 1 60 lbs./ac. German Millet Mayl -Aug 15 40 lbs./ac. 10-10-10 fertilizer shall be applied to all disturbed areas at a rate of 750 pounds per acre, and mulching shall consist of small grain straw applied a rate of 70 pounds per 1000 square feet (70lbs./1000sq.ft.). Mulch shall be anchored by roving or netting. END OF SECTION Technical Specifications July 2005 J 7 J a a I t SECTION 12 - SITE MAINTENANCE 12.1 SECTION INCLUDES Site maintenance to ensure vigorous vegetative cover, stable channel lining, and durability of the work. 12.2 MEASUREMENT AND PAYMENT See SPECIAL CONTRACT PROVISIONS 12.3 EXECUTION Contractor shall revisit the site as required in the special contract provisions to inspect the condition of the project site. Areas of erosion, settlement, poor vegetative cover, and displaced coir or excelsior materials or in-stream structures, shall be repaired. Site visits shall be coordinated with Owner. Erosion areas shall be filled and reseeded in accordance with Section 10 - Permanent Sceding. Areas of poor vegetative cover shall be reseeded and refertilized only. Displaced, damaged, or dead shrub species shall be removed, and replanted in accordance with Sections 8 & 9 - Stream Bank Planting and Buffer Planting. Displaced channel lining materials shall be recovered (if possible) and replaced, or replaced with new channel lining materials to the design line and grade. END OF SECTION J 1 n L i r r Stream Repairs and Bank Stabilization Page 15 Technical Specifications Haywood County Stream Repairs July 2005 E u I E t DRAWINGS 0 r A.f .?l U 1?r A L i ? I ?'.My^.,-Jh PRESSLEY-LINER 51TE VICINITY MAP (NOT TO SCALE) ENGINEERING DESIGN FIRM: McGILL A550CIATE5 55 Broad Street Asheville, NC 28801 (828) 252-0575 ENVIRONMENTAL DE51GN FIRM: 501L ? ENVIRONMENTAL CON5ULTANT5, PA 11010 Raven Ridge Road Raleigh, NC 27G 14 (919) 84G-5900 PREPARED FOR: HAYWOOD COUNTY, NC COUNTY COURTHOU5E 215 N. MAIN 5TREET WAYNE5VILLE, NC 28786 CONSTRUCTION DRAWINGS FOR: PKE55LEY-LINEK SITE STREAM REPAIR5 ? f3ANIA\' STABILIZATION PLAN CONTENTS: HAYWOOD COUNTY, NC Q I . COVER, CONTENT5, ? VICINITY MAP Q2. 51TE MAPPING Q3. 51TE PHOTOGIZAPH5 Q4. EX15TING 51TE CONDITION5 Q4A. EX15TING 51TE CONDITIONS (CONT'D) Q5. PROP05ED REPAIR PLAN Q5A. PROP05ED REPAIR PLAN (CONT'D) QG. CONSTRUCTION 5EQUENCE * PROPO5ED 5TRUCTURE DETAIL5 Q7. TOE 5TABILIZATION DETAIL Q7A. TYPICAL REPAIR DETAIL Q8. ER05ION CONTROL DETAIL5 I Q9. ER0510N CONTROL DETAIL5 II Q 10. PLANTING SCHEDULE * PLANTING DETAIL5 SEAL 24993 D CP U! wz; a° c J-4 z c? ?z ?u z§ 0 a1 gag z f ca ? a c° N zL z ca InV? W/ }W ? a F- c z n Z 0 O o 0 } c Q c = c 5 r? n a I ?. pCpO/ O $$55 pJ?pYWLI ?o?zBm?? Z V O l=I N ONO O 06 ui F- ZQ W? F- Z? 0Z ?U >' 0 SHEET 0.1 rx 2004 COLOR INFRARED SCALE: 1 "= 200' (INFRARED PHOTO OBTAINED FROM NCDENR G.I.S. DEPARTMENT WEB SITE) SITE MAPPING " w J w 1999 ? co cn AERIAL PHOTOGRAPH ?i 'oF r••. o Of SCALE: 1"= 200' SEAL ?05 ?ftt 24993 ?I (AERIAL PHOTO OBTAINED FROM • ';??.,,? •?.? : •.ftlNSft ; ?A, • SHEET HAYWOOD COUNTY G.I.S. DEPARTMENT) CP (`', R? D Q2 , _ SITE PHOTOGRAPHS 4C W 7- SEAL -t I ? S 24993 I` r I N ;9 •°? QINE P' A, ; UI wzs 4. 07 "44. c? *4z Viz; z, ?aE fag ?0. z cdt Q z? zo w? L9 Za z ?Q W O a 3 ? ? I Z V Q C 0 ` U oo 0 }occ 3 aI g £? n0 ?y fiNiV W O J F m Y Z: t W A w A n WU) =? T /rr 1 v! Of W? \ O } J 0 = cn a cn W W U) SHEET Q3 PRESSLEYILINER SITE PHOTO #1- DOWNSTREAM END OF REPAIR (LOOKING UPSTREAM). NOTE LARGE GRAVEL BARS TO RIGHT AND LEFT OF CHANNEL AND ERODED BANKS ON BOTH SIDES. PRESSLEYILINER SITE PHOTO #2 - DOWNSTREAM END OF REPAIR (LOOKING DOWNSTREAM) ALONG RIGHT BANK NEAR CUTOFF CHANNEL. (REPAIR RIGHT 2). PRESSLEYILINER SITE PHOTO #3 - MID-POINT OF REPAIR REACH. (LOOKING UPSTREAM) FROM LEFT BANK PRESSLEYILINER SITE PHOTO #4 - UPSTREAM END OF REPAIR REACH. (LOOKING UPSTREAM) FROM LEFT BANK LEFT BANK REPAIR ENDS @ TREE LINE. RIGHT BANK REPAIR CONTINUES AROUND CHANNEL BEND (UPSTREAM). PRESSLEYILINER SITE PHOTO #5 - UPSTREAM END OF REPAIR REACH (LOOKING UPSTREAM) ALONG RIGHT BANK (REPAIR RIGHT 1). 1 e e I I t NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY EXISTING SITE CONDITIONS PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 1 "- 60' IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. u vy? LEFT BANK UPSTREAM REPAIR FAILED STAIRS LIMIT (APPROX.) . EXISTING EDGE OF WATER, TYP: CROSS-SECTION ##3 APPROX. LOCATOIN RIGHT BANK, SECTION DOWNSTREAM REPAIR LIMIT (APPROX.) 0 i08 DEBRIS JAM W/STEEL CABLE CROSS-SECTION #2 APPROX. LOCATION p`l DOWNED TREE RIGHT BANK, SECTION A UPSTREAM REPAIR LIMIT (APPROX.) -1 I I I I V V I\ I A Y L _L_ U 11 l\, TOP OF BANK, TYP. TYP. P S r' u ® BEFORE YOU DIG] CALL 1-000-632-4949 N.C. ONE-CALL CENTER ITS THE LAW) ,%j1 IIII ?I o 'oF 'ssioN?i SEAL J 24993 yr •, .•?,,? A En u4 wz? to ?w4 'z c? ?z \Uzz z O? ?Ua z w? z? z z? w? a w z 0 0 0 n a 0 } no c awSL? ?° O J IM W 0?1'1?'' 8m2F; z C, < U W< W O I SSSS O N O U ? U C fW- z wQ zz :3 0 ?. U w (D -J z w? i. w SHEET ON ' NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY EXISTING SITE CONDITIONS ' PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 1 "- 60' IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. t H, IJ 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. EXISTING GRAVEL BAR EXISTING GRAVEL BAR EXISTING TOP OF BANK, TYP. CROSS-SECTION V APPROX. LOCATION "= HISTORIC TOP OF BANK, TYP. ' AP _ BURIED CAR / W 51 BLDG? j HOUSE' LOG DEBRIS ?? c SNEp (j! a Y --------RIGHT BANK, SECTION B REPAIR AREA RIGHT BANK, SECTION B RIGHT BANK, SECTION B DOWNSTREAM REPAIR UPSTREAM REPAIR LIMIT (APPROX.) LIMIT (APPROX.) ,`„111111, ,/A A 4 pr SEAL 24993 BEFORE YOU DIGI %? •, ?P Q ?• ?. CALL 1-800-832.4949 ' 9 • .h`?INE? : (p N.C. ONE-CALL CENTER i 9 •• • • 1r ITS THE LAWI il1I III 00 u, Wz; Fz ?Uzs z' 0¢. aE ?aE z Qao W° L7 R z? u z° AIAN ` V4, ?a L > c W a `?F L I z 0 0 l? ) 0 ?l`: JJ) z c L c c c c c 5 a n a 0 o ## Nb n n O J i 03 5 $w$ O W W o??8mrcrc ? Zi:i] ?O?I~i1 FF < y O y 2 'co W < W O ' O W D U O w U) I- z Fn 0 ?- w0ww zz? .D 0 >. 0 _j z0 U U) P W U) dW SHEET 04A L/\I.J III`IV L.LIVL_ VI Yvn IL-I\, I IF. 1 a t J a C I 11 0 6 NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY PROPOSED REPAIR PLAN PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., SCALE: 1 "= 60' IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. 4. CONSTRUCT TOE STABILIZATION AS DIRECTED AT TIME OF CONSTRUCTION. BEFORE YOU DIGI CALL 1-800-632-0949 N.C. ONE-CALL CENTER IT'S THE LAWI PROPOSED APPROX. LIMITS OF DISTURBANCE LEFT BANK UPSTREAM REPAIR LIMIT (APPROX.) PROPOSED CROSS VANE, TYP. ,.' / 0 / ul TRANSITION BENCH TO MATCH EXISTING SLOPE, TYP. AT THE END OF ALL BENCHES RIGHT BANK, SECTION A DOWNSTREAM REPAIR LIMIT (APPROX.) /' PROPOSED LANDWARD SIDE OF BENCH, TYP. / PROPOSED REPAIRED CROSS-SECTION #3 TOE OF SLOPE, TYP. APPROX. LOCATION PROPOSED BENCH, TYP. 1 , t. I FLO Yr UPPER 300' OF 'SECTION A' REPAIR AREA SHALL HAVE INCREASED HEIGHT OF TOE STABILIZATION TYP. 7' - 8' ---RIGHT BANK, SECTION A UPSTREAM REPAIR LIMIT (APPROX.) i PROPOSED J-HOOK, TYP. CROSS-SECTION #2 Z_ APPROX. LOCATIO Q 7L P / 5<__C' `1IIA11,1,,, ! `1 ryIl" ?? ??N?F ssro?9 i2 , /RAG *ESTIMATED REPAIR LENGTH = 1550' SEAL *LENGTH OF TOE STABILIZATION= 2100' - (. *APPROXIMATE DISTURBED AREA = 2.7 ACRES 1111111111\ *FOR SHEETS Q5 & Q5A z w ° Nz ?wl ?z `Uz ????j z 1 V) z. z w? z z C w ®C z ck c 0 U 0 c c Q C C 2 ?a ° ryD g. ° }* p J i m ?$ SS WW 0 z Z z r m ?oo°° f< 0 0012 O iii°NOVO , IW-' J ?a wQ _ZW J? ?o Lu J fA U) 0 w a_ a0 a SHEET 1 1 1 05 l F n 1 e BEFORE YOU DIGI CALL 1-000-632-4849 N.C. ONE-CALL CENTER ITS THE LAWI PROPOSED REPAIRED TOE OF SLOPE, TYP. PROPOSED REPAIR PLAN SCALE: 1"= 60' PROPOSED APPROX. LIMITS OF DISTURBANCE 7 PROPOSED BENCH, TYP. .V /rig/ 1 / ? rr 1 NOTES: 1. ALL SITE DATA AS DETERMINED BY LIMITED ENGINEERING SURVEY PERFORMED BY SOIL AND ENVIRONMENTAL CONSULTANTS, P.A., IN MAY & JUNE 2005, USING GPS, LASER-LEVEL, AND TOTAL STATION EQUIPMENT. 2. ALL LOCATIONS, DISTANCES, AND DIMENSIONS ARE APPROXIMATE AND INTENDED FOR USE IN THE DEVELOPMENT OF A BANK STABILIZATION AND REPAIR PLAN. ' 3. LOCATIONS OF EXISTING UTILITIES AS SHOWN ARE APPROXIMATE ONLY. EXACT LOCATIONS ARE TO BE VERIFIED IN THE FIELD BY CONTRACTOR. ' 4. CONSTRUCT TOE STABILIZATION AS DIRECTED AT TIME OF CONSTRUCTION. POSED J-HOOK, TYP. -PROPOSED LANDWARD SIDE OF BENCH, TYP. RIGHT BANK, SECTION B REPAIR AREA RIGHT BANK, SECTION B UPSTREAM REPAIR LIMIT (APPROX.) CROSS-SECTION V APPROX. LOCATION RIGHT BANK, SECTION B DOWNSTREAM REPAIR LIMIT (APPROX.) CAf f tQ0 sslpy9:/1. , SEAL 24993 Yr D .G P? ?w u ° Fz ?z 0U z z a Oa .4 Va C/)? z ?a L0 w z z z Ll?bw w z Z) 0 U 00 0 00 2 I i i n a II o g b o O J; m 0 W o?.-em LLWW>=1IF Z Li 7 0 0 0 Ul i FF <V1o(n2 < V W ( W ?i pVtOUO z ?a U wg? ?w7) J ? Z WIZ _j W 0 U) U) w0U d? a SHEET C15A 7 c L CONSTRUCTION SEQUENCE: 1. Obtain NCDENR, USACE, & local authority approval for construction. The Contractor must strictly adhere to the conditions of the U.S. Army C.O.E. & the NCDENR DWQ as set forth in the 404 & 401 permits. 2. Notify NCDENR (Land Quality Section) if necessary, ten days prior to construction. 3. Locate existing utilities on site. Coordinate access, staging area and temporary stockpile areas with Owner and Engineer. Engineer to identify and mark "limits of disturbance" within channel 4. Install temporary sediment & erosion control measures, access roads, channel access, staging area, and temporary facilities. NOTE: All installed temporary sediment and erosion control measures will be inspected weekly or after a major rainfall event (> 0.5 inches) by the Contractor. Upon inspection, any necessary repairs will be performed by the Contractor. 5. Clear and grub in required areas for stream repair. Remove and stockpile topsoil in areas to be excavated. Stockpile in areas as Directed by Owner / Engineer. Surround Stockpile Areas with 2 Rows of Silt Fence. 6. Perform stream bank repairs as shown on plans and directed by engineer. Install in-stream structures and toe stabilization as directed by the engineer at the time of construction. Contractor shall not cross "limits of disturbance" without prior approval of the engineer. 7. Stabilize repaired bank zones (lower, mid-, and upper) as shown in details. Apply temporary erosion control seeding measures to disturbed areas as final grading is reached. Re-distribute topsoil, augment as necessary to meet planting specifications. 8. Perform tree and shrub planting as specified. Engineer to be notified prior to planting observation to approve planting bed conditions and plant materials. Tree and Shrub plantings may be delayed until Fall season with approval of owner & Engineer. 9. Apply permanent seeding measures. Remove temporary sediment & erosion control measures including construction entrance (if necessary). 10. Coordinate for walk-thru inspection with Owner, Engineer, and Agency Representatives. 11. Plant all live stake plantings (and tree and shrub species if delayed) during Fall season. RIGHT BANK (113) CHANNEL WIDTH LEFT BANK CLA55'A' OR'B' AGGREGATE STONE 20°-30° ?- GEOTEXTILE FABRIC STEP ONAL) FLOW SCOUR POOL PLAN GEOTEXTILE ClAS M OR W AGGREGATE STONE I EOTE)91LE FABRIC ROCK STEP ! (OPTIONAL) 0 FOOTER ROCKS 5COUR POOL PLAN STREAM CHANNEL BED 1/3 CHANNEL 113 CHANNEL WIDTH WIDTH FLOW GEOTEXTILE FLOW ROCK STEP (OPTIONAL) PROFILE CRO55 ROCK VANE WITH STEP-POOL DETAIL (NOT TO SCALE) ROCK5 PROFILE ROCK STEP (OPTIONAL) 13ANKFULL 5TAGE POOL Wwr Uq wz? a? ° HMq r ?z Z Oz UO< a ?a Z w? w z? LM Wn ?Q z =0 OU Z o?2 0 O 0 ?o 0 Z Z 0 U 0 z J-HOOK WITH STEP-POOL DETAIL (NOT TO SCALE) 13ANKFULL 5TAGE 5000RPOOL e ?§ is n y y M U FWD (n8? LU (F) Ilnn ZZ?J 'J 0 Q 1 Q BED 6 N ? m/ 100 :.4 Z 2 SEAL 0 24993 I V? 5HEET ''?•9 • ?HaINE?P• ? `. Q ro u u n u RESTORED LOWER-BANK ZONE A2 //-TOE STABILIZATION BOULDERS H ,,? ,? ?o e p 00 EXISTING ERODED AND FAILED CHANNEL BANK (TYP.) OVER-EXCAVATE LOOSE MATERIALS AT TOE AND BACKFILL WITH COARSE (BED) MATERIAL FOOTER BOULDERS NON-WOVEN GEOTEXTILE CASING TOE STABILIZATION DETAIL (NOT 70 SCALE) NOTES: 1. SEE SECTION 7.5 OF THE SPECS FOR THE SIZE OF BOULDERS 2. AVERAGE HEIGHT OF TOE STABILIZATION WILL BE APPROX. 4' WITH THE EXCEPTION OF UPPER 300' OF SECTION "A" REPAIR AREA WHICH WILL BE r-8'. G CHANNEL BED ? 111.1 I '% h ' ?. EEss8lph.,.I ;? ;40 1?. ?,?JJ SEAL .( Y( 2 24993 S *,Oita 10 u wz„ ON • Nz? Mz )uz < o.< a z M w w z "v z w? Zzz one W o< H 0 0 z u o ? 0 0? 0 OO Q 0 L Q e II g? 91 t = a e o 1 _J Q N? w Z 0 Z? J Q 'N Cn Q N 0-0 p SHEET Q7 u n TREE & SHRUB PLANTING AREA (RANDOMLY INTERMIXED TREES & SHRUBS) WIDTH OF BENCH VARIES ALONG REPAIR REACH (5'-50').KMINIMUM DESIRED WIDTH IS 5' 1 3H PROPOSED REPAIRED TOP OF BANK EXISTING ERODED AND FAILED CHANNEL BANK (TYP. STABILIZE AND PLANT BENCH SIMILAR TO MID-BANK ZONE PROPOSED REPAIRED BENCH PROPOSED REPAIRED TOE OF SLOPE 65.0' (TYP) APPROX. ORIGINAL BANK & CHANNEL LOCATION TYPICAL EXISTING BANK & CHANNEL LOCATION 3.4' (TYP) V ` - AVERAGE FILL HEIGHT- t3' i ?.._ D 0 oa °od Dog a oa °oog °d 50.0' (TYP) NOTE: 1. RESTORE CHANNEL WIDTH AT TOE OF SLOPE AS SHOWN ON PROPOSED REPAIR PLAN. 2. BREAK POINT ON SLOPE FOR REPAIR AT ELEV.: VARIES 3. DEPTH AND EXTENTS OF UNDERCUT TO BE DETERMINED BY ENGINEER AT TIME OF CONSTRUCTION. 4. REPAIR MAY BE CONSTRUCTED WITH OR WITHOUT TOE STABILIZATION DEPENDING ON SITE CONDITIONS AS DETERMINED BY ENGINEER. 5. LOWER BANK ZONE TO BE CONSTRUCTED USING RIVER BED BORROW MATERIALS AS APPROVED BY THE ENGINEER. MID-, AND UPPER BANK ZONE TO BE CONSTRUCTED USING OTHER APPROVED MATERIALS. 6. BANK REPAIRS TO BE BENCHED INTO EXISTING FAILED SLOPE AS DIRECTED BY THE ENGINEER AT THE TIME OF CONSTRUCTION. REPAIR OPTION (NOT TO SCALE) NOTE: GRADE FROM EXISTING TOP OF BANK TOWARD LANDWARD EDGE OF BENCH AT MAX. 3:1 SLOPE. L7_I I , ELEV. VARIES Im ---?/ ELEV. VARIES OVER-EXCAVATE LOOSE MATERIAL 0 TOE & BACKFILL W/ COARSE (BED) MATERIAL. TOE STABILIZATION W/ NON-WOVEN GEOTEXTILE FABRIC. LOCATION TO BE DETERMINED BY ENGINEER 0 T.O.C. U" Wza 4. ;m; q • Hzq Mz ()zz Uoz<j a 0z< z ?a w? w z? t7 z W? Zz z ?0 W0U zV? :3 0 0 z u C 040 O U O Q 0 L Q =1 e i?_e Willi J_ LuQ NQ W p[ Z Q }} W? J J 4; 0 SEAL 24993 •? ?, NEB: SHEET Q7A u FROM EX15TING ROAD 2"-3" COARSE AGGREGA (RAILROAD BALLAST) EXISTING ROAD I MINIMUM CI' .. 1 I ! I,.: G" HUMP TO DIVERT R FROM D05TING ROAD EXACT LOCATION OF TEMPORARY CONSTRUCTION ENTRANCE TO BE DETERMINED AT PRE-CONSTRUCTION MEETING 5TABILIZED CONSTRUCTION ENTRANCE (NOT TO SCALE) EXISTING CHANNEL BED EXISTING EDGE OF WATER 0 0 k"o 0 cs0 ? ? o? O p 0 I . A 5TABILIZED PAD OF CRUSHED STONE SHALL BE LOCATED WHERE TRAFFIC WILL BE ENTERING OR LEAVING A CONSTRUCTION 51TE TO OR FROM AN EXISTING ROAD. 2. STONE TO BE 2 - 3 INCH WASHED STONE RAILROAD BALLAST, 3. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC STREETS OR EXISTING PAVEMENT. TH15 MAY REQUIRE PERIODIC TOP DRESSING WITH ADDITIONAL STONE A5 CONDITIONS DEMAND AND REPAIR AND/OR CLEANOUT OF ANY MEA5URE5 USED TO TRAP SEDIMENT. 4. ALL SEDIMENT SPILLED, DROPPED, WASHED OR TRACKED ONTO PUBUC STREETS MUST BE REMOVED IMMEDIATELY. 5. WHEN NECE55ARY WHEELS MUST BE CLEANED TO REMOVE SEDIMENT PRIOR TO ENTERING A PUBLIC STREET, WHEN WASHING 15 REQUIRED, IT SHALL BE DONE ON AN AREA STABILIZED WITH CRUSHED STONE WHICH DRAINS INTO AN APPROVED SEDIMENT BASIN. EXISTING TOP OF BANK CONTRACTOR TO CUT ACCE55 RAMP TO SLOPE A5 NEEDED FOR EQUIPMENT ACCE55 EXISTING FAILED BANK MATERIAL TO BE REMOVED CONTRACTOR TO CUT - ACCE55 RAMP TO SLOPE A5 NEEDED FOR EQUIPMENT ACCE55 MINIMUM 12" LAYER CLA55'A', RJPRAP WITH MIN. 12 OZ. WOVEN GEOTEXTILE FABRIC UNDERLAIN PLAN DIVERSION DITCH EXISTING FAILED TOP OF BANK LAY BACK 51DE SLOPES OF ACCE55 TO 5TA13LE GRADE EIXISTING CHANNEL BED CHANNEL ACCE55 DETAIL (NOT TO SCALE) NOTES: NOTE: CONTRACTOR TO REFRESH STONE LAYER AND AUGMENT A5 NECE55ARY TO REDUCE EROSION AND SEDIMENTATION DIVER510N DITCH i-iii-i-i - MINIMUM 12" LAYER CLA55'AI RJPRAP PROFILE II?IIIIII MINIMUM 12 OZ. WOVEN GEOTEXTILE FABRIC %% I I A • t?7E Y SEAL 24993 ; ?'; ' ?hQINB?.' t4 '??111111 ???`` ?u? wzl • Hzp ?z uuzzy 0?< .a ?a ?Z Z w L w? zl v w? ZQ z ?° W0Q) 0 0 Qz M z 000 000 0 Q 0 a a= I I swoll ?Raill J 09 z< 0Q 0 s SHEET QS i NOTES: 2" STEEL ANGLE 8' MAX FOR STD. STRENGTH FABRIC WITH WE ME5H REINFORCEMENT nR SYNTHETIC FILTER FABRJC 5HALL BE BACKFILLED A MIN. OF 8" 1. FILTER BARRIERS 5HALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND DAILY DURING PROLONGED RAINFALL. REPAIR SHALL BE MADE A5 NECE55ARY. 2. FABRJC SHALL BE REPLACED PROMPTLY IF FOUND TO BE IN DISREPAIR. COIR MA PROFILE VIEW 12" ECO-STAKED 24" ECO-STAKED • TRENCHED TOP OF MATTING TO A DEPTH OF AT LEA5T 12", STAKE OR STAPLE IN PLACE, * BACKFILL TO DE51GN GRADE • MINIMUM 24" ECO-5TAKE50 INSTALLED ALONG TOE OF MATTING (Intercept between water surface and bank) 24" EC. 5TA E SYNTHETIC FILTER FABRIC ATTACHED TO P05T5 WITH APPROVED FA5TENER5, PLACE ON UPHILL 51DE OF FENCE. P05T 5YNTHETIC FILTER FABRIC 18" GROUND MAX. _ EXCAVATE 8'x8" TRENCH UP5LOPE ALONG LINE OF P05T5. EXTEND FILTER FABRJC INTO TRENCH, BACKFILL TRENCH AND COMPACT 501L FKONT VIEW • MINIMUM 2' CENTERS ALONG BOTTOM • MINIMUM I' OVERLAP AT JOINING 5ECTION5 OF COIR MATTING COIR MATTING DETAIL (NOT TO SCALE) 3. 5EDIMENT DEP051T5 5HALL BE REMOVED AFTER EACH 5TORM EVENT AND WHEN DEP051T5 REACH APPROXIMATELY 1/3 HEIGHT OF BARRIER. BANK OR BENCH ECO-5TAKEO • 12" ECO-5TAKE50 IN5TALLED IN BANK FLU5H WITH COIR MATTING ABOVE BOTTOM ROW OF 24" ECO-5TAKE50 • ECO-5TAKF.50 SPACED AT MAXIMUM 3' CENTERS (APPROX.) BOTH DIRECTION5 TEMPORARY SEEDING SPECIFICATIONS General Areas where no 5ub5tantial or 5igmficant progress 15 made for more than 15 days should be temporarily seeded a5 follows. All areas should be seeded, mulched, and tacked. Incidental grading shall not constitute 5ub5tantial or significant progre55 in construction activity. 5eedmg and mulching shall be done immediately following con5truction. All disturbed areas shall be dressed to a depth of 8 mche5. The top 3 mche5 shall be pulverized to provide a uniform seedbed. 5eedmg 5eedmg Dates May I - Aug. 15 Aug. 15 - May I Soil Amendments 5eedmg 5pecIe5 German Millet Rye (grain) Rate (Ib5lacre) 40 GO Follow recommendations of Soil te5t5 or apply 2,000 Ib5lacre ground agricultural lime5tone and 750 Ibs/acre 10-10-10 fertilizer. Mulch Mulching shall con5i5t of small grain straw applied at a rate of 70 Ib5./ 1000 sq.ft. Mulched areas shall be mechanically tacked in place (or other approved tacking method). No asphalt shall be u5ed for tacking. Use jute, exc651or matting or 5imilar material to cover exposed areas of concentrated flow. AA?,M-onnn?-o Inspect and repair mulch frequently. RBfertdize and re5eed a5 required to maintain vigorous temporary vegetative cover during construction. ?,,????_?a,, ??j?•? GIN z? • HZI ?z UzZ U z 0? a a Z ? ac w? w z? M n L9 wh Z a ?02 Z W0 ZV? D 00 00 O Q Q a=e? §0011tl J IV Z= 0Q U zL Oo N o0C w 5 0 Z 0 0 Q SHEET Q9 51LT FENCE u r r J L u TREES SPECIES COMMON NAME TOTAL # SIZE QUERCUS ALBA WHITE OAK TBD BARE ROOT PLATANUS OCCIDENTAL IS AM, SYCAMORE TBD BARE ROOT QUERCUS COCCINEA SCARLET OAK TBD BARE ROOT BETULA LENTA SWEET BIRCH TBD BARE ROOT LIRIODENDRON TULIPIFERA YELLOW POPLAR TBD BARE ROOT TSUGA CANADENSIS E. HEMLOCK TBD BARE ROOT BETULA ALLEGHANIENSIS YELLOW BIRCH TBD BARE ROOT ACER RUBRUM RED MAPLE TBD BARE ROOT BETULA NIGRA RIVER BIRCH TBD BARE ROOT SHR UBS SPECIES COMMON NAME TOTAL # 51ZE CARPINUS AMERICAN TBD BARE ROOT/POTTED CAROLINIANA HORNBEAM HAMAMELIS AMERICAN TBD BARE ROOT/POTTED VIRGINIANA WITCHHAZEL ALNUS BROOKSIDE TBD BARE ROOT/POTTED SERRULATA ALDER LEUCOTHOE HIGHLAND TBD BARE ROOT/POTTED FONTANESIANA DOGHOBBLE SALIX NIGRA BLACK WILLOW TBD BARE ROOT/POTTED CORNUS AMOMUM SILKY DOGWOOD TBD BARE ROOT/POTTED SALIX SERICEA SILKY WILLOW TBD BARE ROOT/POTTED NOTES: 1. TREE * SHRUB 5PECIE5 TO BE RANDOMLY INTERMIXED ON G'XG' SPACING UTILIZING AT LEAST 5 OF THE 9 TREE SPECIES LISTED AND 3 OF THE 7 5HRUB 5PECIE5 LISTED. MATERIAL 50URCE AND DE5IRED 5UB5TITUTION5 TO BE APPROVED BY DESIGNER. 2. TOTAL NUMBER OF TREE5 IS 1,220. 3. TOTAL NUMBER OF SHRUBS IS 1,220. 4. TREE AND 5HRUB PLANTING TO BE ON MID-BANK AND UPPER BANK ZONE. I 2 3 Open planting Place bare-root Clo5e hole with hole with 5eedling in hole - Shovel or Auger- Shovel or Auger root collar at no air space surface around roots BARE-ROOT 5EEDLI NG PLANTING DETAIL (NOT TO SCALE) TI WOODEN STF LIVE 5TAKE5 TO CON515T OF BLACK WILLOW, 51LKY DOGWOOD AND 51LKY WILLOW PLANTED A5 SHOWN IN DETAIL ALONG LOWER BANK ZONE. TREE SHELTER W/ BASE APPROX. I" INTO GROUND 5A5E FLOW lA/A ATIr1A1 PROFILE VIEW U TREE SHELTER DETAIL TO BE INSTALLED ON ALL BARE-ROOT AND CONTAINERIZED PLANTED TREES (NOT TO SCALE) NOTE: TREE SHELTER SHALL BE PHOTODEGRADABLE (IN FULL SUNLIGHT ENVIRONMENT) AND/OR BIODEGRADABLE ANGLE-CUT END • LIVE STAKES INSTALLED IN BANK WITH DEAD-BLOW HAMMER • 4/5 OF STAKE IN GROUND • BUDS ORIENTED UPWARDS • 3' CENTERS (APPROX.) • CUT EXPOSED END OF LIVE STAKE AFTER INSTALLATION IF DAMAGED DUE TO INSTALLATION (i.e. damaged bark, 5pht ends, etc,) LIVE STAKE PLANTING DETAIL (NOT TO SCALE) SLOPE BREAK OR BENCH SEAL 24993 .? • NQINE?:•• #li D. C ?z HZI ?z UUzZ pa? a ?o z w w z M (7 z w? Z zz ?0 W0<(1) ZV? n 0 0 00 0o Q 0 z z D 0 0 0 Q s C) lu =p NZ Z F- z d. gg SHEET Q 10 PBOAh2? OF COMMISSIONERS ?•-^ ^?. COUNTY MANAGER /?QOD CO C. JACK HORTON MARK S. SWANGER, CHAIRMAN MARY ANN ENLOE, VICE CHAIRMAN COUNTY ATTORNEY Gy LARRY R. AMMONS LEON M. KILLIAN, III L. KEVIN ENSLEY 180 J. W. "KIRK" KIRKPATRICK, III July 22, 2005 Mr. Scott McLendon, Asheville Regulatory Field Office Chief Asheville Regulatory Field Office US Army Corps of Engineers 151 Patton Avenue Room 208 Asheville, NC 28801-5006 ? ?(r--,-, Dn/7r.:3 LS VV ffSS 0 Ms. Cynd1 Karoly, Supervisor 401 Oversight and Express Permits Unit JUL 2 5 2005 2321 Crabtree Boulevard AURA Mail Service Center titiETU,NDSANDS OR yA N Raleigh, NC 27699-1650 R.E.: 404/401 Permit Applications for Haywood EWP Work Dear Mr. McLendon and Ms. Karoly: Attached please find the subject applications for two (2) EWP sites in Haywood County. The information included with these applications has been developed in conjunction with the Natural Resources Conservation Service, the Haywood County Soil and Water Conservation District, the Army Corps of Engineers, Asheville Office, DWQ's Asheville Regional Office, the NC Wildlife Resources Commission and the US Fish and Wildlife Services. The technical details and supporting information was developed and compiled by our consultant team which is coordinated by McGill Associates, P.A. This is Haywood County's submission for critical EWP sites on the East Fork of the Pigeon River. We have directed our representatives to carefully develop these applications and to provide adequate opportunity to consider all potential impacts of this work and to proceed with this urgent stream repair work. We look forward to quick regulatory action and approval of these repair plans so this important public good work can be accomplished. As we enter again into the hurricane season for the east coast of the United States, Haywood County and all those areas affected by the devastating hurricanes and tropical storms from 2004, we are reminded that getting these damaged stream areas repaired is an essential objective in trying to minimize future environmental and property damage impacts from these still damaged sites. We have made every effort to effectively address each and every concern related to this repair work and the need to protect this area's water resources. There are no threatened or endangered species in the areas where the proposed improvements are planned. 215 NORTH MAIN STREET • COURTHOUSE ANNEX • WAYNESVILLE, NORTH CAROLINA 28786 PHONE: 828.452.6625 • FAX: 828.452.6715 E We are looking forward to being able to proceed with this work. Please let me or our coordinator for this project, Mr. Kenneth Futreal (828.400.3279) know of any issues or consideration that we need to make to secure approval for this planned work. In accordance with the contact we've made with DWQ's regional 401 contact, Mr. Keven Barnett, we have submitted directly to him his copy of these repair plans and applications. Also, since NC has "waived" fees for these EWP 401 s, we have not included any permit fees. Thank you for your attention to these applications. Sincer c aywood County Manager Enclosures: cc: Kevin Barnett / enclosures cc: Kenneth R. Futreal