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HomeMy WebLinkAbout20071448 Ver 1_401 Application_20070807ENGINEERING & H Y D R O G E O L O GY SO COLLEGE STREET, ASHEVILLE, NC 28801 TEL. 828.281.3350 Fac.828.281.3351 www.altamontenvironmental.com August 22, 2007 Mr. Steve Chapin US Army Corps of Engineers 151 Patton Avenue, Room 208 Asheville, NC 28801-5006 Mr. Kevin Barnett NCDENR, Division of Water Quality Asheville Regional Office 2090 U.S. Highway 70 Swannanoa, NC 28778 p 7- 1 4 4 8 ~~~Y~'~`EC`~~i~ Rt ~ ~iVED Ms. Cyndi Karoly NCDENR, Division of Water Quality 401 Wetlands Unit 1650 Mail Service Center Raleigh, NC 27699-1650 Mr. David McHenry NC Wildlife Resource Commission 20830 Great Smoky Mountain Expressway Waynesville, NC 28786 Subject: Streambank Stabilization DWR Project 08-Tributary to Hooper Creek/ Myers and Ketcham Properties Polk County, North Carolina Dear Messrs. Chapin, Barnett, and McHenry and Ms. Karoly: Enclosed please find the pre-construction notification (PCN) for Streambank stabilization on properties owned by Deborah Myers and by William and Linda Ketcham located in Polk County. Work applied for in this permit includes Streambank stabilization and debris removal The project site has been identified by the Polk County Soil and Water Conservation District (SWCD) as one area eligible for North Carolina Department of Environment and Natural Resources (DENR), Division of Water Resources (DWR) Water Resources Development Project Grant funding. The State of North Carolina has recently provided funding through the DWR for damaged areas that were not addressed by the federal Emergency Watershed Protection (EWP) program. The project area consists of approximately 2,3001inear feet of streambank located along a tributary to Hooper Creek in southeastern Polk County. A site vicinity map is included as Figure 1 of the attached PCN document. The tributary is classified by the DENR as class "C" waters throughout the project area. I have signed the application as an authorized agent for Polk County and the property owners. A letter of access /authorization is attached at the end of the PCN document. ~~~~C~~~r~,I~ .t Au 7 `! Y~ Zi1U~ 1NC:TlAML~Q ~tit~o .sro~'x~vnr~~ ~Ft~,~, . P:\Polk SWCD NRCS\Polk DWR nroiects 02-08\Mvers Site-DWR-08\Mvers PCN cover letter.doc Mssrs. Chapin, Barnett, Karoly, McHenry August 22, 2007 Page 2 of 2 We appreciate your review of this application. If you have any questions or would like additional information, please contact me. incerely, Jc~sl' b. Lenk, .G. enclosures: Check for permit fee (Karoly only) PCN- DWR Project 08-Tributary to Hooper Creek / Myers and Ketcham Properties Access /Authorization Agreements Figure 1-Site Vicinity Map Figure 2-Stream Longitudinal Profile Figure 3-Stream Cross-sections Stream Structure Illustrations Copy of Level III Assessment cc (letter only): Polk County Soil and Water Conservation District P:\Polk SWCD NRCS\Polk DWR nroiects 02-08\Mvers Site-DWR-08\Mvers PCN cover letter.doc PRE-CONSTRUCTION NOTIFICATION 0 7- 1 4 4 8 Office Use Only: Form Version March OS USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) FA~~EN I. Processing RECEIVED 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ^ Riparian or Watershed Buffer Rules ^ Section 10 Permit ^ Isolated Wetland Permit from DWQ ® 401 Water Quality Certification ^ Express 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 13 and 27 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ^ 4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII, and check here: ^ 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coast Environmental Concern (see the top of page 2 for further details), ch ~k !J \.~ II. Applicant Information AUK `L ¢ 2007 Owner/Applicant Information w1~N~ ~v~o ~ ~atp ~'~~ ~~ Name: Property Owners: Deborah 1Lfyers Applicant: Polk County Soil & Mailing Address: 3814 Collinsville Rd Water Conservation Dist. Coulmbus, NC 28722 P.O. Box 236, # 4 Annex Owner Phone: 828-894-3588 Columbus, NC 28722 Ken Ketcham 3967 Collinsville Rd Columbus, NC 28722 Owner Phone: 828-859-2629 Telephone Number: 828-894-8550 Fax Number: 828-894-2231 E-mail Address: Sandra. reid(a,nc. nacd. net 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Joel Lenk Company Affiliation: Altamont Environmental Inc. Mailing Address: SO College Street Asheville, NC 28801 Telephone Number: 828-281-3350 Fax Number: 828-281-3351 E-mail Address: ilenkna,altamontenviornmental. com Page 5 of 16 III. Project Information 5. 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: DWR 08-Tributary to Hooper Creek/Myers & Ketcham Properties 2. T.I.P. Project Number or State Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): P99-41(Myers), P88-42, P88-41 (Ketcham) 4. Location County: Polk Counter Nearest Town: Hickory Grove Subdivision name (include phase/lot number): NA Directions to site (include road numbers/names, landmarks, etc.): Follow I26 east to Exit 1 in South Carolina. Turn lei (east) o~ the ramp on to Highway 14 (Landrum /Sandy Plains Road). Follow Hi~y 14 approximately one and three quarter miles and turn right (southeast~on to Collinsville Road. Follow Collinsville Road approximately one mile to the second creek crossing at 3814 Collinsville Road. The site extends north (upstream) rom the Collinsville Road bride over the tributary to the fence at the Myers property line. Site coordinates (For linear projects, such as a road or utility line, attach separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): 035.2028259 °N 082.1217356 6. Property size (acres): Myers =19.77, Ketchum=91.19 Total =110.96 7. Name of nearest receiving body of water: The tributar~to Hooper Creek. 8. River Basin: Broad River Basin (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/admin/maps/.) a sheet that oW Page 6 of 16 9. Describe the existing conditions on the site and general land use in the vicinity of the project at the time of this application: The conditions at the site consist of approximately 2, 300 linear feet o~~aired incised stream, exhibiting failing banks and a lack o~iparian v~etation. Land use in the vicinity of the protect consists o horse arms, pastures, woodland and rural residences. 10. Describe the overall project in detail, including the type of equipment to be used: The State of North Carolina has provided funding through the DENR Division of Water Resources (DWR) Water Resources Development Project Grant program for damaged areas that were not addressed by the Emergency Watershed Protection (EWP~program. The grant targets streambanks that are actively contributing sediment to waters of the United States resulting in a reduction o water quality. The Myers / Ketchum site has been identified by the Polk County Soil and Water Conservation District (SWCD) as one area eligible for DWR undin~ The project area includes 2,300 linear feet of stream. Bank stabilization will address proximately 1 600 linear feet of the project area. Riparian enhancement will address the entire site. The tributary is classified as "C" waters throughout the project area. A Level III Assessment and survey of the stream with a rotating laser was per ormed by Altamont Environmental Inc. prior to the design of bank stabilization and riparian enhancement measures. The assessment evaluated the existing conditions o stream morphology and the quality o~egetation within the riparian corridor. The findings of the assessment were provided to the Polk County SWCD Lattached). In areas where streambanks have failed, atrack-mounted excavator will be used to create a oodplain bench at or slily below the bankfull elevation. Above the bench, the bank will be sloped to approximately 3:1 (H.• I~ and will extend to the elevation of the top of bank. Rootwad rock toe and single vanes may be used throughout the project area in order to divert and dissipate energy away from vulnerable streambanks. Typical illustrations of stream structures are attached. Disturbed areas from the edge of water to the top of bank will be seeded with Ernst Conservation Seeds, Riparian Buffer Mix ENRMX--178. Disturbed area below the top of bank will be over-seeded with a nursery crop o~grain suitable to the season in which planting will take place. Caution will be used to keel fertilizer and mulch out of the river and above the typical high water elevation in order to reduce the risk of eutrophication. Fescue seed mixes will not be used at the site below the elevation of the top of bank or within 20 feet of the stream. More invasive seed, such as lespedeza will not be used on this project. Disturbed areas between the edge of water and an elevation above bankfull will be stabilized with 700 weight coin matting and disturbed areas above the coir mat will be stabilized with coconutgeo jute mat that does not contain plastic netting or non- biodegradable materials. Erosion control matting will be trenched in on all sides to a depth ofsix inches and will be staked down with a combination of wooden and live stakes. Streambanks located in areas subject to higher hydraulic stresses or where tar eg living trees exist close to overstep banks will be protected by the installation of rootwads, rock toe, rock or log vanes or a combination thereof Page 7 of 16 The pro'et ct may include removal of debris (i. e. lame trees) from the stream channel that is currently obstructing water flow limiting hydraulic capacity of the stream channel or is orcing flow into unprotected banks. Debris that is stable and is situated such that it is protecting vulnerable banks will be le t in place. Trees removed as debris and their root balls may be used for bank stabilization and as aquatic and terrestrial habitat as rootwad structures in several locations within the project area. Rootwads will be constructed from selected downed trees. Trees will be cut 1 S to 20 eet up the trunk from the roots and sharpened to a point with a chainsaw. In locations were rootwads are used a trench will be excavated large enough to accommodate a ooter to placed parallel to the streambank and the rootwad placed perpendicular to the toe of the slope. The rootwad will be inserted, sharpened trunk end first into the bank such that the trunk gust above the roots will rest on the footer log. Rootwads will be oriented so that stream ow is deflected awa~from the streambank to protect ZargL living trees near these locations. Rootwads will be placed at an angle such that they deflect stream ow away om the bank and preserve near bank mature live trees. Rootwads and footer logs will be installed so that the bottoms of the structures extend to the maximum scour depth o the channel and the top of the footer log and bottom of rootwad log are roughly at the same elevation as the stream invert. Rootwad trunks will be inserted into the streambank by a track mounted excavator so that the root ball is exposed and at least two thirds of the trunk is buried in the bank. Rootwads and ooter logs will be backfilled with material excavated from the footer log and rootwad trenches and where necessary, will be stabilized on either side with large angular rock or rip rap. Rock Toe protection will be installed in the following manner: one row of boulders will be placed in a footer trench. The footer trench will key into stable area of the bank at the stream and downstream extents of the rock toe. The footer trench will be lined with, and rock toe protection will be backed with 700-weight filter fabric. Depending on the vulnerability of the area, another tier of lame boulders may be placed on top o the ooter rock and set back approximately one to two feet in order to match the slope of the streambank. Void spaces behind the footer and tiers of rock will be back-filled with material that was excavated during the installation of the footer trench. When backfilling is complete, excess filter cloth protruding,from between the boulders and the backfill will be trimmed to an elevation sli htg ly higher than the elevation of the top of the boulder toe protection. Single veins and cross veins constructed of either large angular rock or hardwood tree trunks may be used to help turn flow in streambends and protect streambanks in high stress areas on the outside of turns in the stream. These structures will be installed using, similar techniques as used for installing rock toe structures, utilizing footer trenches, footer logs and rock all of which will be backed with ,filter cloth. Please refer to the attached illustrations for more detail pertaining to these in-stream structures. Equipment used to accomplish the above tasks will include a rubber tired back-hoe /loader, a track-mounted excavator with hydraulic thumb, one or two 1 S-ton dump trucks, and hand Page 8 of 16 tools. A wood chipper may be used to reduce the amount of debris to be hauled away from the site and minimize potential disposal fees. Wood chips may be used to mulch areas beyond the top of bank. Sedimentation and erosion control practices will be implemented throughout the protect. After stabilization measures are in place and disturbed areas of the site are seeded, native trees and shrubs in the form of live stakes, bare-root and container plants will be planted in stabilized areas as well as in other areas o the proiect reach where riparian vegetation is parse or narrower than 20 feet from the water's edge. Tree varieties were selected partially by observations made during the Level III assessment and by selection of native trees that exist in the Piedmont Re ig on of North Carolina. The contractor will be required to install equal numbers of at least six varieties of large trees from the ollowing~list: River Birch, Shagbark Hickory White or Green Ash, Black Walnut, American Beech, Tulip Poplar, Sourwood Silver Maple Eastern Cottonwood, Sycamore, Black Cherry, White Oak or Southern Red Oak. The contractor will also be required to install equal numbers o at least eight species from the ollowin list of small trees: Downy Serviceberry (Shadebush), American Hornbeam (Ironwood) American Holly, Red Mulberry, Common Alder, Red Chokeberry Button Bush Witch Hazel, Winterberry, Northern Maleberry. Catawba Rhododendron Wild Azalea Blackberry Dog hobble or Fetter bush. Plantin~of trees, shrubs and live stakes will conform to the specifications outlined in the NCDENR Guidelines for Riparian Bu, ffer Restoration. At the project site work shall proceed from downstream to upstream to reduce sediment loading. Stagin areas for equipment and material will be placed in upland areas away from surface water and outside owe oodplain. Work will proceed as follows at the work area (as applicable). 1. FIaQ the work limits. 2. Mark live trees and shrubs to be protected. 3. Construct temporary construction entrances /exits, where necessary. 4. Place erosion control fencing~and other protective measures, as necessary. S. Inspect and maintain r~airs. A Site Vicinity Map is included as Figure 1. A Site Plan View is included as Figure 2. Cross-sections proposed construction plans and a longitudinal profile o the proiect area are included as Figure 3. Representative photos of the proiect area may be found in the attached Level III Assessment at the end of the document. Page 9 of 16 1 I. Explain the purpose of the proposed work: The work is being completed to substantially reduce the amount of sediment entering the tributary within the protect area. The protect is designed to return the r~erenced portion of the tributary to a state of stability and to increase it's natural potential b~providing the tributary access to a floodplain and by restorin~~and enhancing native vegetation within the riparian corridor. 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 USAGE 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. Permits have not been previously applied for at this site. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. No V. Proposed Impacts to Waters of the United States/yVaters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed separately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Provide a written description of the proposed impacts: Impacts are discussed in detail in Section III 10 of this document. Page 10 of 16 2. Individually list wetland impacts. Types of impacts include, but are not limited to mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. Wetland impacts will occur as part to this project. Wetland Impact Site Number (indicate on map) Type of Impact Type of Wetland (e.g., forested, marsh, herbaceous, bog, etc.) Located within 100-year Floodplain (yes/no) Distance to Nearest Stream (linear feet) Area of Impact (acres) Total Wetland Impact (acres) 3. List the total acreage (estimated) of all existing wetlands on the property: Wetlands do not exist on the referenced property. 4. .Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. To calculate acreage, multiply length X width, then divide by 43,560. Stream Impact Number (indicate on ma) Stream Name Type of Impact Perennial or Intermittent? Average Stream Width Before Im act Impact Length (linear feet) Area of Impact (acres) 1 Trib. to Hooper Cr. Stabilization Perennial ~17•Bkf t @ 1,600 < 1.5 Total Stream Impact (by length and acreage) 1.5 Page 11 of 16 5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, flooding, drainage, bulkheads, etc. Open Water Impact Site Number (indicate on ma) Name of Waterbody (if applicable) Type of Impact Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) Area of Impact (acres) Total Open Water Impact (acres) 6. List the cumulative impact to all Waters of the U.S. resulting from the project: Stream Impact (acres): < 1.5 Wetland Impact (acres): 0 Open Water Impact (acres): 0 Total Impact to Waters of the U.S. (acres) < 1.5 Total Stream Impact (linear feet): 1,600 7. Isolated Waters Do any isolated waters exist on the property? ^ Yes ®No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands Describe the method of construction (e.g., dam embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): ' Current land use in the vicinity of the pond: Size of watershed draining to pond: Expected pond surface area: Page 12 of 16 VI. 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. On behalf of the Polk County SWCD Altamont will provide contractors engaged in the implementation of this work both written and verbal instructions o~all impact avoidance statements provided below. All heavy equipment will be kept out of the stream channel during streambank stabilization work and debris removal except where absolutely necessary to complete work. Disturbance of the channel bottom, streambanks and equipment access areas shall be held to the minimum necessary to allow for implementation of bank stabilization work. Work will be conducted in a downstream to upstream direction. Streamflow will be diverted away.from work areas with the use o sand bags or bK placing excavated footer material such that it deflects water away from work areas. Work will be completed in stags such that se mg ents o the project will be completed and stabilized on a daily basis. Temporary grass/grain cover shall be planted on all bare soil immediately a ter ground disturbing activities are completed. Straw mulch and tall fescue grass will not be used in r~arian areas. Herbaceous, woody shrub, and tree vegetation will be installed on the streambank upon completion of bank stabilization work. Altamont will provide a site manager to routinely inspect and supervise contractor work to help ensure impact avoidance instructions are being followed. VII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on January 15, 2002, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete. Page 13 of 16 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/strmgide.html. 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. Not Applicable. 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For additional information regarding the application process for the NCEEP, check the NCEEP website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please check the appropriate box on page five and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount ofNon-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): VIII. Environmental Documentation (required by DWQ) 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? Yes ® No ^ 2. If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ^ No 3. 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 ^ Page 14 of 16 IX. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. 1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify)? Yes ^ No 2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (s uare feet) Multiplier Required Miti ation 1 3 (2 for Catawba) 2 1.5 Total * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0244, or .0260. X. Stormwater (required by DWQ) Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss. Stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. Impervious acreage does not exist at the site and plan- or the project will not create impervious acreage. XI. Sewage Disposal (required by DWQ) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. Wastewater will not be generated as part o this project. Page 15 of 16 XII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ^ No Is this an after-the-fact permit application? Yes ^ No XIII. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality? Yes ^ No If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description: Implementation of this project should have a positive impact on nearby downstream water gualit~by reducing the amount ofsediment bein~eposited in the stream within the project area and by enhancing and widening the riparian corridor. 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). Planned implementation o this project is scheduled to take place in the a~of 2007 when trees become dormant and lantin onditions are avorable. Late Se tember to earl December. :_--~' "Z dfplicatent's Signature ~ Date signature is valid only if an authorization letter from the applicant is provided.) Page 16 of 16 LETTERS OF ACCESS /AUTHORIZATION r,u.1,, ~nn~ ~,ZFp~ di±amcrt ~^~rircrmer~ta~ AC~:E~~ ,A,G~EENIENT h1c. F2?1 G, ,~, ._~ ~~ '~'ft~~;~i '.. ~~ _. i ~ ~f i ~ 7 -~ ~~ ~J~ t li, i ~t ~la The SWCD is requewsting access to the praperry far the purpose of assessing and repairing damage to the streambarzk, stream Channel, and flaadplain that was caused by hurricanes Frances and Ivan and mare recent starts. The repair work ~°it1 include same or all of the following elements: -Streambank Stabilization -Native plant Re-~'egatatian -17ebris Removal -Exotic/Inva~sive plant removal, S~NCD and the Property i?rvner agree: 1. Property owner grants permission to ~WCD and its contractors and agents to enter upon theix land far the purpose of assessing and repairing the flood damage caused by Hurricanes Prances and. Ivan. Additionally. this agreement includes the right of ingress and egress on the land for the purpose of at~.irtaining the emergency works for the period of one year from the date of completion. ~. Property owner grants permission to SWCD and its contractors and agent to conduct stream stabilization measures, which may include debris rern.oval, stream bank stabilization using rocl~s, woad, and/or, mulching and seeding, andJor channel re1_acation. ~. 5~,~7'CT) agices to comply ~rit~h loco:, state, and federal laws applicable to the work, and further agrees to exercise due care and caution in f'ae performance of all tivork on the Property. 4. This Agreement constitutes the entire understanding between the parties. All prior agreements or underskaradings,whether oral or written, are superseded. This Agreement maybe amended only by a Written docurnent duly executed by the parties. 5 , The proposed measures are intended to repair Rood damage to the stream and to return affected areas to pre-flood conditions. Repair andtar improvements to structures are not part of this project. Damaged bridges; drivEways, and eroded fells are not addressed by measures. SWCIa and its Contr'aGtC-rS will strive to minimize impacts to adjacent properties. However, some impact maybe unavoidable. The Property owner releases S~VCU and its contractors from liability for aaty damage incurred as result of this woriz. 6. This agreement does not provide confirmation that the subject site is eligible for Emergency Funds, nor does it enc~.rmlier funds fttr any repair worm at this site, 7. 1?ropzrty owner agrees not t~; remove or modi~~~ canstructiQn repairs, including vegetation, for tine year tram the date of completion. Phis Access Agreement is made between Polk County fail arid: Water CanSer'v'atiQn District supervisor Board (~'VVCT)~ and: ~~ ~~ !j . 1 J~ L n 'J ? J L V~ ~'' i~ ~±~ i I I v i i} ~~ ri ~ V i i~ i~ i e n- t~ l hl„ G^<1 G ~ i r v~ J L J I i J S. S~i%CD will discuss the draft design with the Property C1'uv'ner prior Co submittal for permitting. 9. Property ~Jwner agrees to reimburse SWCD for all costs associated with the design. if the property ow~mer decides tc~ t~~i~~te this agreement after work has began. 10. The Polk Co~iinty Soil anal Water conSer`vatiUZx Z3i5frict and Poly County praperiy owners hereby aut$orize At~mont En~iroruxxental Inc. {AgentfCansultant) to 51gn and execute all necessary permits and coordinate communications with the apnropriafe regulakary agencies. Palk County Sail and'V4'atsr Conservation District bate: ~ f ' ~ W~~ SWCD or eprese ire ~~: Date: J~- `~~~~~ Property ihvner By. ~., . ~at~:~c~,~s~~ ACCESS AGREEMENT This Access Agreement is made between Polk County Soil and Water Conservation + '~~! District Supervisor Board (SWCD) and: Pro e Owner: i~(.~''/"~r`,'c~ ~'I '~~r'r'?fz%~^~'t ,, Street Address: ~~ ~ ~~ ~ - %~ l : ~~ ~'' .~ ~.st~, ,~~~' ,~! _ The SWCD is requesting access to the property for the purpose of assessing and repairing damage to the streambank, stream channel, and floodplain that was caused by hurricanes Frances and Ivan and more recent storms. The repair work will include some or all of the following elements: -Streambank Stabilization -Native plant Re-vegatation -Debris Removal -Exotic/Invasive plant removal SWCD and the Property Owner agree: 1. Property owner grants permission to SWCD and its contractors and agents to enter upon their land for the purpose of assessing and repairing the flood damage caused by Hurricanes Frances and Ivan. Additionally, this agreement includes the right of ingress and egress on the land for the purpose of maintaining the emergency works for the period of one year from the date of completion. 2. Property owner grants permission to SWCD and its contractors and agent to conduct stream stabilization measures, which may include debris removal, stream bank stabilization using rocks, wood, and/or, mulching and seeding, and/or channel relocation. 3. SWCD agrees to comply with local, state, and federal laws applicable to the work, and further agrees to exercise due care and caution in the performance of all work on the Property. 4. This Agreement constitutes the entire understanding between the parties. All prior agreements or understandings, whether oral or written, are superseded. This Agreement may be amended only by a written document duly executed by the parties. 5. The proposed measures are intended to repair flood damage to the stream and to return affected areas to pre-flood conditions. Repair and/or improvements to structures are not part of this project. Damaged bridges, driveways, and eroded fields are not addressed by measures. SWCD and its contractors will strive to minimize impacts to adjacent properties. However, some impact may be unavoidable. The Property owner releases SWCD and its contractors from liability for any damage incurred as result of this work. 6. This agreement does not provide confirmation that the subject site is eligible for Emergency Funds, nor does it encumber funds for any repair work at this site. 7. Property owner agrees not to remove or modify construction repairs, including vegetation, for one year from the date of completion. 8. SWCD will discuss the draft design with the Property Owner prior to submittal for permitting. 9. Property Owner agrees to reimburse SWCD for all costs associated with the design if the property owner decides to terminate this agreement after work has begun. 10. The Polk County Soil and Water conservation District and Polk County property owners hereby authorize Altamont Environmental Inc. (Agent/Consultant) to sign and execute all necessary permits and coordinate communications with the appropriate regulatory agencies. Polk County Soil and Water Conservation District By: ~C~l'17 ~~ri /t :, lV 71~ l~r'il Date: ~/'~G~ -~,, SWC resenta 've By: Date: gf ~a~0 ~? ~~ Property Owner ,~ By: w-~ ~~ f"fly ~.. Date: ~ ~.,~°'lo~,%`~)`? s fE a 1 • tB.. 1 I ``�� 1� ,I +r sk) f' Nkkoty Grove t� \ 'Al 4 j 1�1 j ± ��f�7.,• -=i 1 `"} C\g k r mss' • �f$9d fol(� f x r f • 4ountry Club s J z °i�QdF$ a i ILJ $20N. P01A CO S ARTgRG APPROX[MATE =- ,.' I--- -- - - SITE LOCATION _ 5-6 River 41, ( y4 fM '! , a r SOURCE: USGS LANDRUM L FINGERVILLE VEST QUADRANGLES 124,000 SCALE, 1982, REVISED 1990 i • VICINITY MAP FIGURE ENGINEERING & HYDR0GEOLOGY DWR-08-TRIB. TO HOOFER CR./ 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL.828.281.3350 FACM8.281.3351 MYERS AND KETCHUM PROPERTIES www.altwnontenvironmental.com POLK COUNTY, DRAWN BY: JOEL LENK NORTH CAROLINA PROJECT MANAGER: STU RYMAN SCALE (FEET) CLIENT: PCSWCD 1000 0 1000 2000 DATE: 08-2-07 PAP— SWCD NRCS\PD r DWR PROJECTS 02-08\MYERs SITE-DWR-08\FIGURE\MYERSFIGI.DWG n W 3 O a CV a F d w U O w J F ~ \ (n a p ~ ~ W Z +' O W ~ -~ ° ~ W ~ O o N ~ ~ W ~ o ........:...............:...............: N , ~ a ~ ° ~UOU N - ~ .~ W v ....................~,. ,,....,,_ o + ~ ~ ~ ~ ~ ~ - ,..,,,,,,,, - ~ .,.,,, - o (1J W O ~ ~ o - o p - ..j , +~ : o - - o ~ - - - _~ _ _ t _ ~ ~ ~ } 3 - =~ - ~ Z - a a z ~ o - ,.,.. ., . - (1.1 W ~ ~ U a O : 1 3 t - t = v/ ~ ~ Q i-' 3 t o - i N " o - - - ~ = =Q` - i - ' = -~ - ~ ...I .. ~ ° W +' ~ + N . ........... . ........ . 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Past Stream Bed Invert Footer Log Top Of Footer Log At Or Below Stream Invert SECTION Root Wad and Footer Log Extends To Max. Scour Depth . ~ Footer Log Flow 4 Root Fan 1 Trunk Root Wads Oriented \ Perpendicular To Flow Direction ° Id Construction Note: Bracing A Brace Log Can Be Used Boulders For Additional Stability // And Should Be Pinned To (0~ ~ Adjacent Rootwads t PLAN Section & Plan Views Adapted NOT TO SCALE From Rosgen (1999) • ~ ~ ~ ROOTWAD SCHEMATIC E N G I N E E R I N G & H Y D R O G E O L O G Y 50 COLLEGE STREET, AS1-IEVILLE, NC 28801 TEL.828.281.3350 FnC.828.281.3351 DWR-08-TRIBUTARY TO HOOPER CREEK www.altamontenv ironmental.com MYERS AND KETCHAM PROPERTIES DRAWN BY: JOEL LENK POLK COUNTY, NORTH CAROLINA PROJECT MANAGER: STU RYMAN SWCD CLIENT: POLK CO SOURCE: THE VIRGINIA STREAM RESTORATION & STABILIZATION BEST MANAGEMENT . DATE: g/pp/ppp7 PRACTICES GUIDE. 2004 P:\POLK SWCD NRCS \PO~K DWR PeodecTS 02-OB \MreRS SirE-DWR-08 \Flcuees\ROOTWAD Flc.owc _~ Bankfull Stage ~ ) Fk>rv -~ 4 - 15% -inner Berm C ~') ~~~ ~ an -~~ iii n ~~ t nel = ~~~~ ~ ~~,~ ~~~~~~\~ sit,~~~~ ~~i//iii ~ a/G~ /i~ ° ~~/ii /1 ~ii '-~ ~ ~~ ~ ~ ~~~ ~~~ ~ ~ = PROFILE Note: Use of geotextile material on upstream side of logs is strongly recommended FLOW I Slope and Vegetate Banks Banldull Legend ~) Header Rods Pleader. Log Footer ~/ Vegetffibn ~ Log NOT TO SCALE ENGINEER_1_NG-& HYO R_O G.E OL_0_GY 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL.828.281.3350 Fnc.828.281.3351 www.altamontcnvironmental.com DRAWN BY: JOEL LENK PROJECT MANAGER: STU RYMAN SOURCE- NORTH CAROLINA CLIENT: PCSWCD STREAM RESTORATION DATE: 8/22/2007 INSTITUTE LOG VANE ILLUSTRATION DWR 08-TRIBUTARY TO HOOPER CREEK MYERS AND KETCHAM PROPERTIES POLK COUNTY, NORTH CAROLINA P:\POLK $WCD NRC$\POLK DWR PROJECTS 02-08\MYERS SITE-DWR-08\FIGURES\$TRUCTURES ILLUSTRATIONS.OWG CROSS-SECTION Structure spans 1/2 to Z3 of stream width. J,~ PLAN Flow ~, \ai \\ / r /// Channel \\~~ Sut~Pavement~~` \~\\= PROFILE Slope and Vegetate Banks Banlduq \\ ~ Bench _/ - \\_ /1~~ Legend .~ ~ ,~ Header Rock ~~ :Tree Ele/~- - ~ ~'at Footer Rods ~ Vegetation I NOT TO SCALE E_N G I_N_E_E_R_ I N G & H Y O R O G E 0_l._0 G Y 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL.828.281.3350 Fnc.828.28L3351 www.altamontenvironmental.com DRAWN BY: JOEL LENK PROJECT MANAGER: STU RYMAN SOURCE: NORTH CAROLINA CLIENT: PCSWCD STREAM RESTORATION DATE: 8/22/07 INSTITUTE Notes: -Rocks in vane are not spaced. -Rocks in "J"section are spaced 1/2 rock width. CROSS-SECTION Inner Berm ROCK J-HOOK ILLUSTRATION DWR 08-TRIBUTARY TO HOOPER CREEK MYERS AND KETCHAM PROPERTIES POLK COUNTY, NORTH CAROLINA FILE PATH: P:\Pau SWCD NRCS\PaLrc DWR Pftwecl4 02-OB\MTERS Site-DWR-OB \Fi4uaE4\ STRUCTURES Iuusm4nON5.ow4 -Rocks in "J" section are spaced y2 rock width. -Use of geotextile upstream of logs is recommended F Flow Y3-Yz of Bottom Width t__/ ~~ c~ ,: ~` ,. ~ Log Diameter 14"-36" PLAN Slope and Vegetate Banks Bankfu0 PROFILE /'~~ L`°l°~ For logs <24" diameter, cable 31ogs (10"-12") on ends using Y" cable. Bottom two logs should be below the stream bed. NOT TO SCALE _N.GIN.E__ER1NG & H YOROGEOLOGY 50 COLLEGE STREET, ASI-IEVILLE, NC 28801 TEL.828.281.3350 FnC.828.2813351 www.altamontenvironmental.com DRAWN BY: JOEL LENK PROJECT MANAGER: STU RYMAN SOURCE: NORTH CAROLINA CLIENT: PCSWCD STREAM RESTORATION DATE: 8/22/07 INSTITUTE LOG J-HOOK ILLUSTRATION DWR 08-TRIBUTARY TO HOOPER CREEK MYERS AND KETCHAM PROPERTIES POLK COUNTY, NORTH CAROLINA FILE PCTN: P:\POLK SWCD NRCS\Pau DWR PaWECrs 02-OB\MTER$ Si~f-DWR-OB\Fwuaes\ Srr+ucluRfS l~~siRGnONS.owG CROSS-SECTION Structure spans 1/2 to ?J3 of stn:am width. Note: f Flow -Rocks in vane are not spaced. r,, rr~, i~ /~ I'I r rr~ ~~~~ r i~~ ~~ r~,I ~~ 1 - 1,,, ,.,~ 1 ,;, , Ir ,. ... ,. ,~ ,,,,, ,/ IJ \ /~~ ~ /<< ,~~ PLAN Bankfull Stage 415°/ _ Inner Bean Flow -~ ,~. -~' 1 ~. ~ ~"t ~ iii ~// 1 ~ ~~ _ ~ - _~- ~- ~~ - - HS lour ~ 11=err= ///_~ n =~-iii =iii -~ ~ .r= Channel ~~~~~ _ ~~~ ~~~~~ ~~~_ ~~~ ~~~~~~ ~~~~~~ ~~~ PROFILE Slope and Vegetate Banks Bankfull \\ ~ Bench - - ~1~ / //~ Legend Bed ~ .~ <~ ~~ ~ -//ill-%/.~1!/- - -///_-/// j//-=j /// /// - ///_///- Header Rode = ~ ~\\ _~ ~\\--\~ ~\\ , ~~ ~ Vegetation ~..~Y PooterRodc CROSS-SECTION I NOT TO SCALE N G I N E E R I N G & H Y D R O G E O L O G Y 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL.828.28L3350 EAC.828.281.3351 www, altamontenvironmental. com DRAWN BY: JOEL LENK SOURCE: NORTH CAROLINA PROJECT MANAGER: STU RYMAN STREAM RESTORATION CLIENT: PCSWCD DATE: 8/22/07 INSTITUTE SINGLE ROCK VANE ILLUSTRATION DWR 08-TRIBUTARY TO HOOPER CREEK MYER AND KETCHAM PROPERTIES POLK COUNTY, NORTH CAROLINA FILE PATH: P:\POU SWCD NRCS\P0.R OWR mwEtrs 02-OB\MreRC Site-DWR-OB\Ficur~5\ STRUCTURES luusinAnaws.owc COPY OF LEVEL III ASSESSMENT E N G I N E E R I N G & H Y D R O G E O L O G Y 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL. 828.281.3350 FAC.828.281.3351 www.altamontenvironmental.com August 21, 2007 Ms. Sandra Reid District Administrator Polk County Soil & Water Conservation District P.O Box 236 #4 Annex Building Columbus, North Carolina 28722 ~~ ~~ ~1 ~~ ~' to ~r o ~ ~~ ~;;~~,a ~~ Re: Level III Assessment of Stream Condition DWR Project 08-Tributary to Hooper Creek / Myers and Ketchum Properties 3814 Collinsville Road Polk County, NC 28722 Dear Ms. Reid: Altamont Environmental Inc. (Altamont) has completed a Level III Assessment of the existing conditions for the above referenced stream reach and has analyzed the stream in its current state n comparison to its full natural potential. The procedures used in this evaluation were consistent with those outlined in the Apri12003 North Carolina Agricultural Cost Share Program (NCACSP) Manual. This letter documents the background information on this project as well as the results of the Level III Assessment. BACKGROUND The Polk County Soil and Water Conservation District (SWCD) received a grant from the North Carolina Department of Environment and Natural Resources (DENR), Division of Water Resources (DWR) to stabilize eroding streambanks at seven different locations in Polk County. To secure the grant, SWCD staff inventoried the damage at the seven sites and obtained preliminary approval from the landowners for the proposed repairs. However, because detailed assessments were not completed, upon receiving the grant, the SWCD retained Altamont to complete a detailed. assessment of each site, design repairs for the damaged areas and submit the designs to the United States Army Corps of Engineers (USAGE) and DENR for permitting in the form of aPre-Construction Notification (PCN) for the projects. Although the SWCD desires to incorporate natural channel design elements into the repairs, where possible, detailed natural channel design procedures were beyond the scope of this project.. Therefore as an initial step, a Level III assessment was completed on each reach to quantify the impacts and establish a basis for the design of the stabilization measures. The project area is located on a tributary to Hooper Creek in a narrow valley oriented in a north-south direction that originates at the southwest slope of Little Mountain, southeast of the community of Penile. The project area is bounded by the fence at the Myers property at the upstream end and a bridge that passes over tributary at Collinsville Road on the downstream end. The proposed project area is approximately 2,300 feet in length. Bank stabilization measures, riparian restoration and exotic invasive plant removal are proposed for the entire length of the tributary within the project area. P:~Polk SWCD NRCS~PoIk DWR projects 02-08~Nlyers Site-DWR-08~Nlyers Level III Letter.doc Ms. Ried August 21, 2007 Page 2 of 4 LEVEL III ASSESSMENT On July 30~and 31, 2007 Altamont representatives analyzed the condition of the stream. Using various documents to collect field data, including: a Level III Assessment form (from pages V-84 of the NCACSP Manual), a Stream Survey Data Sheet, a Qualitative Riparian Vegetation Assessment Guide, a Channel Stability Rating form, and a Bank Erosion Hazard Index form. Copies of these completed documents are attached. Also attached are, a longitudinal profile, cross-sections, and photographs of the assessed reach of the tributary to Hooper Creek. The tributary to Hooper Creek within the project area is classified as a GSc stream according to the Rosgen Classification of Natural Rivers. The following paragraphs provide supplemental information and support the data included on the attached forms. The bold and underlined text corresponds to specific fields on the Level III Assessment sheet. Riparian Vegetation within the project area is generally in fair condition. Narrowing of the corridor for creation of horse pasture, bank erosion and an abundance of exotic invasive plants (e.g. Multi-flora Rose) appear to be responsible for the degraded quality of vegetation. Bank erosion has affected riparian vegetation growth on streambanks at many locations. In areas where stream banks are vertical, vegetation is non-existent and these banks are actively contributing sediment to the tributary, Hooper Creek and potentially other waters downstream. These factors have had adverse effects on the stream channel, water quality and riparian vegetation in the stream corridor. Please refer to the Qualitative Riparian Vegetation Assessment Guide sheet in the attachment for more detail. Stream Size can be defined by several methods. For this project, an estimated stream size (cross- sectional area at bankfull stage in square feet (ftz)) was developed using the regional curve for rural Piedmont North Carolina Streams (Harman, W.H, et al, 1999). Specifically, the crosses-sectional area was estimated by comparing the approximate drainage area to the bankfull cross-sectional area shown on the regional curve. Based upon this evaluation, the bankfull cross-sectional area for a stream with a drainage area the size of this tributary should fall between 6 and 19 ftz. The actual bankfull cross- sectional area measured in the project reach is approximately 21 ft2. Cross-sectional area at bankfull stage, bankfull width, and average bankfull depth, as measured in the field, are represented in the attached cross sections of the tributary to Hooper Creek channel and Stream Survey Data Sheet. The Stream Order of the tributary to Hooper Creek is second order. A second order stream is defined as a stream in which two or more first order streams have converged. The Meander Pattern of the tributary can be qualitatively described as meandering. However topography and bedrock influence the pattern of the stream. Meander Length and wavelength were calculated as part of the assessment. The tightest Radius of Curvature measured in the project reach was 12 feet. Average Belt Width was not measured, and Sinuosi was calculated to be 1.39. Detailed assessment of meander pattern is typically completed to aid in natural channel design, which is beyond the scope of this project. P:~Polk SWCD NRCS~PoIk DWR projects 02-08~Ivlyers Site-DWR-08UVIyers Level III Letter.doc Ms. Ried August 21, 2007 Page 3 of 4 - A Channel Stability Rating was calculated using the Pfankuch rating procedure (see the Pfankuch Channel Stability Rating Sheet which is included in the attachment). The Channel Stability Rating score for the assessed reach was calculated to be 134, which falls in the Poor/ Unstable category for a stream reach classified as GSc. Sediment Supply determinations were made by using a Bank Erosion Hazard Index (BEHI) method and near bank stress estimations based on channel pattern and cross-sectional shape observed in the field. Based on this assessment, the sediment supply to the tributary in the project area was classified as extreme. Near Bank Stress was observed to be extreme due to a high sinuosity; particularly in areas where mid channel bars force water into poorly vegetated streambanks and at the outside of channel bends where steep non-vegetated banks exist (see photographs and descriptions in the attachment). The Streambank Erosion Potential was found to be high based on assessment by the Bank Erosion Hazard Index (BEHI) method and a BEHI score of 36 was determined. 5treambed (Vertical) Stability was found to be unstable based on the Entrenchment Ratio of the stream. The Width/Depth Ratio Condition was found to be high. Based on field measurements the bankfull Width is calculated to be 17.16 feet, the mean bankfull Depth is 1.22 feet and the Width/Depth Ratio is 14.06 feet/feet. As discussed, the Stream Type for the tributary to Hooper Creek in the project reach was determined to be GSc based on the Entrenchment Ratio, Width/Depth Ratio, Sinuosity, Stream Type, Slope and Channel Material. The Flow Regime within the project area is altered and unstable. The Depositional Pattern in the channel within the project area shows signs of high sediment load in that pools appear to be filled with new sediment and mid and side channel bars have formed in riffle and run areas of the stream. These changes in the stream channel are most likely due to reduction of riparian vegetation within the stream corridor, eroding streambanks, creation of horse pasture near the streambank, and inadequate sediment and erosion control measures at land disturbing activities upstream. Evidence of Debris Blockages were observed during field assessments consisting of stumps of trees that had fallen into the stream channel due to under cut banks. A longitudinal Profile of the stream channel was developed and used to calculate Water Surface Slope and Valley Slope. Bed Features and their relationships were identified in the field on the longitudinal profile. Features such as Steps, Pools, and Riffles, and Conyergence/Divergence of the stream flow were noted and entered on the Level III assessment sheet. The tributary does not exhibit a Plane Bed channel. Pool/riffle S acin can be viewed on the longitudinal profile included as Figure 2 in the attachment. Also included in the attachment are several cross-sections produced from data collected during the assessment of the project reach. P:~Polk SWCD NRCS~PoIk DWR projects 02-08~Iv1yers Site-DWR-08~Nlyers Level III Letter.doc Ms. Ried August 21, 2007 Page 4 of 4 While conducting the Level III assessment of the project, it was observed that nearly all of the streambanks on both sides of the tributary are nearly vertical or undercut, bare of vegetation and are contributing sediment to the tributary and waters downstream throughout the year. Altamont understands that the original estimate for streambank stabilization included only the streambanks on river left and that the former property owner on river right was. unwilling to cooperate with the grant program. During a field visit the new property owner, Mr. Ken Ketcham granted access /authorization for the streambanks along his property. Altamont recommends repairing streambanks on both sides of the tributary as well as enhancing riparian vegetation throughout the project reach where vegetation is sparse, consists mainly of invasive species, or is narrower than 20 feet from the edge of water. Altamont appreciates the opportunity to provide these assessments and recommendations to the SWCD for this project. Please feel free to contact me with any questions or comments. Si Joel D. e , P.G. Attachments: Level III Assessment Form Stream Survey Data Form Qualitative Riparian Assessment Guide Phankuch Channel Stability Rating Sheet BEHI Evaluation Sheet Figure 1-Site Vicinity Map Figure 2-Stream Longitudinal Profile Figure 3-.Stream Cross-Sections Photographs and Descriptions P:~Polk SWCD NRCS~PoIk DWR projects 02-08Uv1yers Site-DWR-08~Iviyers Level III Letter.doc STREAM SURVEY GUIDANCE FORMS LEVEL III: ASSESSMENT OF STREAM CONDITION AND DEPARTURE SUMMARY OF "CONDITION" CATEGORIES FOR LEVEL III INVENTORY . Stream Name Tributary to Hooper Creek Location Myers / Ketcham, Trib. of Hooper Creek Riparian Vegetation Fair, Narrow Corridor, Invasives Stream Size, Stream order 21 ft2, second order Meander pattern over sinuous Channel stability rating (Pfankuch) 134, Poor Sediment supply (check apprapriate ca#egory): Extreme x Very High High Moderate Low Streambed (vertical) stability Aggrading Degrading x Stable Width/depth ratio condition: Nd`rr~tl (stable'; High Very high x Streambank erosion Potential: Bank erodibility: Near-bank stress: Extreme x Extreme x High High Moderate Moderate Low Low General Remarks ObseNers Lenk, Yurkovich Stream Type GSc Date 7/30/2007 Flow regime Altered and Unstable Depositional pattern Accelerated Debris/channel blockages Existine / Imyending Altered Channel State: Entrenched/Unstable Dimensionishape: Width 17.16 Depth 1.22 Width/depth ratio 14.06 Patterns: (*show as funct. of Wbkf): Meander length` NM Radius of curve" 12 Belt width` NM Sinuosity 1.39 Profile: Water surface slope .0057 Valley Stope. 0.003 Bed features: Riffle/pool x Step/pool Conver./divrg. Plane bed no Other Spacing* See Figure 2 Describe alterations: Attach photographs taken mid-stream looking up and downstream. Make site map. Attach vicinity map of reach and/or aerial photo for specific location. Note any permanent cross-section for level IV verification of cross-section stability, actual erosion rates, change in pebble counts, deposition studies, sediment sampling, etc. Attach copy of: stream classification field form, channel Stability rating form, bank erosion rating form, profiles, cross-sections, pebble counts, etc. Signature: NCACSP MANUAL, APRIL 2003 PAGE V-84 Stream Survey Data Sheet ~ Slte DWR-08 Myers & Ketcham Properties /Tributary to Hooper Creek Date 7/30/2007 , Survey Crew Lenk, Yurkovich Note: Values collected from representative cross-sections measured in damaged areas of stream Riffle Cross-Section: s Area at Bankfull, Ab,~ (ftz) 21 Mean Depth at Bankfull, Db~ = Ab>~ / Wb~ (ft) 1.22 Width at Bankfull, Wb,a (ft) 17.6 Entrenchment Ratio, ER = WrPa / Wb~ (ft/ft) 1.06 Width Flood Prone Area, W~,a (ft) 18.20 Width to Depth Ratio, W/D = Wb~ / Db~ (ftlft) 14.06 Maximum Depth Bankfull, DUX (ft) 1.56 Bank Height Ratio, BHR = D ToB / Dm~ (ft/ft) 3.86 Max Depth Top Low Bank, DTOB (ft) 6.02 Max Depth Ratio = D~aX / Db~• (ft/ft) 1.28 Longitudinal Profile (minimum of 20 X bankfull width):. Length of Channel Thalweg, Lam, (ft) 2,327 Slope of Channel, Sa1e = DELEV / Lam, (ft/ft) •0057 ' Length of Valley, Caney (ft) 1,680 Sinuosity, K = L,,,. / ~aveY (ft/ft) 1.39 Elevation Change (head first riffle to head last riffle), ~ELEV (ft) 12.78 Pool Cross-Section: Pool Area at Bankfull, A.P~i (ft2) 59.05 Pool Area Ratio = A.Poo~ / Ab,~ (ft2/ft2) 2.81 Pool Width at Bankfull, W poo1(ft) 23.40 Pool Width Ratio = W Pool / Wb~ (ft/ft) 1.36 Pool Max Depth Banldull, DPoo~ (ft) 3.67 Pool Max Depth Ratio = DPoo~ / Dbkf (ft/ft) 3.01 Pattern Survey (minimum of 2 wavelengths, list ranges of measurements): Meander Wavelength, Lm (ft) NM Meander Wavelength Ratio = Lm / Wb~• (ft/ft) 1`TM Meander Belt Width, Wbit (ft) NM Meander Width Ratio = Wb„ / Wb~ (ft/ft) NM Radius of Curvature, ~ (ft) 12 tightest Radius of Curvature Ratio = ~ / W,;,~ (ft/ft) 0.70 Pebble Count Results (reachwide): Median Particle Size, d50 (mm) NM (estimated sand) Rosgen Stream Classification: GSc Note: NM means Not Measured T Qualitative Riparian Vegetation Assessment Guide Preliminary Assessment Project nameDWR-08 Myers & Ketcham Date 7/30/2007 Proposed Project length 2,300 feet Existing vegetation Dominant tree species Sycamore, Poplar, Red Maple, Hickory, Cherry, Sweet Gum Size distribution of trees 40-80 ft, Mature, narrow riparian corridor on river left Dominant shrub species River Birch, Dogwood, Shrub sized sapling of trees listed above Dominant herbaceous Species Poison Ivy, Grasses, Christmas Fem, various vines. Successional stage, disturbances, Or potential for natural change Succession is prohibited in some areas on river left by pasture, trail, mowir Patchiness Vegetation is patchy along the streambanks do to steepness and erosion. Visible stresses Pasture creation, mowing and exotic invasive plants Bank Conditions Bare banks Yes, ~ 60% of banks in project are are lacking vegetation. Presence and density of large trees Lar e trees abundant and close to the to of bank is some locations Angle and presence of Undercuts undercut banks exist on both sides of the stream with angles of 70°- 110° Material Sandy, Clayey, Silt Invasive presence Yes,' Privet, Multifloral Rose Patchiness Land use Wildlife impacts or protection No Recreational Horseback riding /training Official No Agricultural and grazing Yes Mowing Yes Herbicides Unknown Other disturbances No Soil Composition (series if known) Sandy Clayey Silt with some Gravel and cobble rock fragments Compactedness Generally uncompacted Fertility Moderately fertile Organic material present on non erosional surfaces Testin No Construction plannin Potential for transplants Minimal Potential for tree fencing No Invasive Species Prive and ulti ra R se Action recommended Y remo al du 'ng p ject onst ction Dominates site N Looming problem N Insignificant N Sources surround site N g r~ VJ d U .~'. w N m U U Y C a a~ c~ C Y.n Y >. 3 '~" W °'~ v~ ti O M G }'".. 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E `~ ~? ~ a~ 8 0 d o~ °. o in c7 Ili° a° m c7 li a° Bank Erosion Hazard Index S1te DWR-08 Myers & Ketcham Properties /Tributary to Hooper Creek Survey Crew Lenk; Yurkovich Date 7/30/2007 Category Bank Ht Ratio (ft/ft) Root Depth :Ratio (%) Root Density (%) Bank Angle (degrees) Surface Protection (%) Total Index Very Low Value 1.0 -1.1 100 - 80 100 - 80 0 -.20 100 - 90 -Index 1-2 1-2 1-2 1-2 1-2 <10 Low Value 1.1- 1.2 80 - 55 80 - 55 20 - 60 90 - 50 Index 2-4 2-4 2-4 2-4 2-4 10-20 Moderate Value 1.2 - 1.5 55 - 30 55 - 30 60 - 80 50 - 30 Index 4-6 4-6 4-6 4-6 4-6 20-30 High Value 1.5 - 2.0 30 - 15 30 - 15 80 - 90 30 - 15 Index 6-8 6-8 6-8 6-8 6-8 30-40 Very Value 2.0-2.8 15-5 15-5 90-120 15-5 High Index 8-9 8-9 8-9 8-9 8-9 40-45 Extreme .Value > 2.8 < 5 < 5 > 120 < 5 Index 10 10 10 10 10 > 45 Field Value . 3.86 ~ 30% 50% 90° ~ 40'/°, Measure Index ] 0 6 5 5 5` -31- Total Field Index 3 ~ 1 Numerical Adjustments 5 Bedrock: BEHI Very Low Boulders: BEHI Low Cobble: Decrease by one category if graveUsand less than 50% Gravel: Adjust Index up 5 - 10 points depending on sand % Sand: Adjust Index up 10 points SildClay: No Adjustment Stratification: .Adjust Index up 5 - 10 points depending on position of unstable layers in relation to bankfull stage Adjusted BEHI 36 /High _ Upon Cre.r .. ~ - - ~ " Hickory Grove . `" ,z ~ ~ad~fox ~ Co~~r.ryC1,~6,1 j 1, ~ ,ISSS . `. - . .. I ~ . I ,~ - L,~ ' ~ .~ • ~ ~ - i'6~.OT ~ - - ~ ~ _ _ , - , .,; , . a , . ; l SwART,gNBtI 2 ' ~ - ._ G CO _ _ ____ - f A P P R O X 1 M AT E _ _ - '- - - ~ _ _POi.K CO ,~ ; r ~ _-- ,; SPARTgTj$URG CO ---` -- - SITE LOCATION ~ `~' ~ ' ~ ~ ~~ _ . " ~.: _ _ 'i - I l~ f / ~- . ~1 ~` ~', - Q - -- ._ ~ .,_. ~ ~ ~,.y _ - _ ,; ., ,~ " ~ , ` 1 ,`l /, ~ J - - - _. ~ l - SOURCE.~ USGS LANDRUM 6 FINGERVILLE VEST ~ __ - -~ QUADRANGLES 1+2,000 SCALE, 1982, REVISED 1990 ' ~ ~' ~ ~ VICINITY MAP FIGURE ENGINEERING & HYDROGEOLOCY 50 COLLEGE STREEI, ASHEVIl"LE, NC 25801 DWR-08-TRIB. TO HOOPER CR./ iEL.828.281.3350 FAC.828.2813351 www.al[aznontenvironmental.com MYERS AND KETCHUM PROPERTIES FOLK COUNTY, DRAWN BY: JOEL LENK NORTH CAROLINA PROJECT MANAGER: STU RYMAN SCALE (FEET) CLIENT: PCSWCD ~ooo o ~ooo zooo DATE: 08-2-07 P:\POUC SWCD NRCS\P0.x DWP wtglEt~S 02-OB\MVERS SirE-DWR-OB\F ~GWES~MrERSF~GI.owG o, v v In 0 d _~ W a River Left River Right 100 ~,,,,,,,,,,,,,,~~,~„~~,,,,~~ .~,~,,,~,~„~,~~„~,,,~ ,~~~~~,. ~,,,,,,~„~,,,~~„~~,,,,,,,,~ .,,~ ,,.,,,,,,,,,,,,~,,,. _ _ "~ ~` _ _ Proposed Floooplain Bench and Strearnbank Slope 80 .,,,,,,,,,,~~,~„~~,,,~,,,,,~,,,,,,~~,,,,~,,,,,,~,,,~,,,,,,,.,~„~~,,,~.,,,,~~,,,~„~~,,,,,~,,,,.,,, „~„~„~„~~,,,,,,. 0+00 0+20 0+40 0+60 0+75 Pool Cross-Section River Left River Right L e g e n d 100 :,,,,~~,~,,,,,,~,,,,,~~„~,,,,,~- ~~7T,-~~..~.,~ ,,,,,, _ _ 0+00 0+20 0+40 Riffle Cross-Section0+4z N I N R I N H Y R Y 50 COLLEGE STREET, ASHEVILLE, NC 28801 TEL.828.281.3350 FAC828.281.3351 ww w. al tam onteuv ironmental. com DRAWN BY: PAUL DOW PROJECT MANAGER: STU RYMAN SCALE (FEET) CLIENT: FOLK COUNTY SWCD NRCS 5 0 5 DATE: B/17/07 //////i Flood-prone Elevation Normal Flow Elevation Bankfull Flow Elevation Bankfull Area Existing Ground Elevation Proposed Ground Elevation ', CROSS-SECTIONS FIGURE DWR 08-TRIBUTARY TO HOOFER CR. / - f 1YERS & KETCHAM PROPERTIES POLL( COUNTY, NORTH CARLINA ~o ~ FILE PATH: P:\POLK SWCD NRCS \POLK DWR PROJECTS 02-08 \MYERS SITE-DWR-08 \FIGURES\ MYERSSTREAMDATA.DWG 0 0 .................... ...................... i :N ~ -+ , o d ... ...., ....,..,.,. ~ = a, - ~ - w o, - - - u d _ - o i N _ +~ d - - - 3 - ~ - o =o - - O~ - =o :o ~ =~ - o _ d > - W =o :o - -_ 3 - =0 =0 l~ - =0 :~ _ =0 :O d' :, - ~ :~ i O o +' ~~ o d ,,, ........ ........... + U =M O - ", - J :~ O : ~ , _ - - U - - o N ~ :..,...,., - I (lJ - _ O L U N - o 4- .~ti R' - o =o 0 0 0~ 00° .~ .--~ 0 d U O J O ---~ u 0 0 0 0 ,~ m ao n, s U ................:...~ ,.,,..,,,... o M - oN M O - ~ (1J - ~' o =o - =, - : i : o _ :i i ~ :~ - i =o o - - cLl O ~ ~ ~ ........... ,........ +~ ~, ~ m ~ - =~ - v _ - w - - ~1 - U ~O d ~ ............... .. ............ 4- - = ~ L - =~ - _ - ~ - '~"> o . .... 3 .. . . .... - t f I .......... - ~ ~ - ~ I' O ,..........~ .: ........... . O ~ ~ = ~ ~_ - i =0 :O - ~ :~ ~: - i- 0 - .o - ~ - ~ _ .--. O -F' I = d I > - ~ ~ o - ~ ~ W p ~ ~ - - 3 i d - -_ S = - ~ - ~ o ,,.. ,-..,.,..,o (U «aa~~ suoi~nna13 pawnssy W ~ a, ~ ~ ~ U c°' o O O ~ W ii ~ ii D S U O ~--J Z ' ~ r---i ~~ -~ d d U //'~ U (~ L~ d d }~ ~..~ (~'~ ^~' O nH// / I~ O w ~N ~ (/) Q ~ ~ W Z ~ W ~ O ~v oa ~~~U ~ ~ _ J ~ Q O I~ = U z ~ F- W ~ ~ ~ Z ~ ~ ~ a a°~o ~ ~ c~ U I- ap W L ~ ~ ~ o 0 00 '. N vt z^~ . ~ N ~ ~~ N :~~o ¢w> o~ ~, a ~~o ~, ~ ~~ N ~ 00 a U HW 0 z 0 F 0 wl a 0 z 3 0 a W J Q U a w a~ Z ~~ ~ U H N o ~ ~ ~ Z J W ~ Q QUA ~ Z Y ~ j-~ ~aO m f-- Z W F 3~zw Qow~ ~ ~ J Q D W U ~ PHOTOS AND DESCRIPTIONS PHOTOGRAPHS & DESCRIPTIONS DWR PROJECT 08-MYERS AND KETCHAM PROPRERTIES, TRIBUTARY TO HOOPER CREEK, POLK CONTY, NC Photo 1. View northwest, showing debris blockages, mature trees near top of bank, and overhung non-vegetated bank in background. Note placement of debris in foreground to protect Myers property. P:~Polk SWCD NRCS~PoIk DWR projects 02-08U~Iyers Site-DWR-08~Ivlyers photos for Level IILdoc P:~Polk SWCD NRCS~PoIk DWR projects 02-08Vvlyers Site-DWR-08~Ivlyers photos for Level IILdoc Photo 3. View northeast, showing tight bend in project area and failing cut-bank. Photo 4. View south of mature trees near top of bank and potential location for rootwad structures. P:~Polk SWCD NRCS~PoIk DWR projects 02-08Wlyers Site-DWR-08Wlyers photos for Level IILdoc Photo 5. View southwest showing vertical poorly vegetated bank and exotic invasive plants.