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HomeMy WebLinkAbout20141037 Ver 1_401 Application_20140914McGill A S S O C I A T E S September 19, 2014 US Army Corps of Engineers Asheville Regulatory Field Office 151 Patton Ave., Room 208 Asheville, NC 28801 -5006 RE: Beetree Creek Bank Stabilization Project Pre- Construction Notification, NWP #27/18 Swannanoa, NC Dear Sir or Madam: On behalf of our clients, Gods Way Baptist Church and Buncombe County, please find enclosed a PCN application for the Beetree Creek Bank Stabilization Project dated September 19, 2014. The purpose of the project is to stabilize approximately 250 linear feet of streambank on Beetree Creek adjacent to the access road for Charles D Owen Park and the Gods Way property. A NWP -27 and NWP -18 are being requested to complete the proposed work. Four copies of the PCN application are being provided to the NCDENR, Division of Water Resources (with a check for $570.00 to cover the 401 permit fee); one copy of the PCN applicatio n Resource Commission. McGill Associates, P.A. and should be copied on all project correspond questions or comments. Sincerely, McGill Associates, P.A. Jo /CVilas Program Services Manager- Environmental McGill Associates, P.A. (828) 297 -6946 is being provided to the NC Wildlife is the Authorized Agent (forms included) ence. Please let us know if you have any Cc: Central Office, NCDWR with check for $570.00 Doug Besler, NCWRC Pastor Joel Burton, Gods Way Baptist Church Greg Isreal, Buncombe County General Services Director Environmental Planning Finance 11cGill Associates. I.A. • 3764 Rominger Road, Banner Elk, .Forth Carolina 28604 Office: 326 -297 -69.16 • Fax: 828-297 -1982 0�- WATF9OG Office Use Onl 0� 2 0 1 4 1 0 3 7 Corps action I a < DWQ project n . _ Form Version 1.3 Dec 10 2008 Page 1 of 12 PCN Form — Version 1.3 December 10, 2008 Version Pre - Construction Notification (PCN) Form A. Applicant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: ®Section 404 Permit E] Section 10 Permit 1 b. Specify Nationwide Permit (NWP) number: 27 &18 or General Permit (GP) number: 1c. Has the NWP or GP number been verified by the Corps? ® Yes ❑ No 1 d. Type(s) of approval sought from the DWQ (check all that apply): ® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit ❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization 1 e. Is this notification solely for the record because written approval is not required? For the record only for DWQ 401 Certification: ❑ Yes ® No For the record only for Corps Permit: ❑ Yes ® No 1f. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu fee program. ❑ Yes ® No 1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1h below. ❑ Yes ® No 1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ® No 2. Project Information 2a. Name of project: Beetree Creek Bank Stabilization ^, 2b. County: Buncombe _.._' 2c. Nearest municipality / town: Swannanoa 2d. Subdivision name: 2e. NCDOT only, T.I.P. or state project no: DENR- 1NATEK RESOUKCES 401 A BUFFER PERMITT;NG --- =--- — 3. Owner Information 3a. Name(s) on Recorded Deed: Gods Way Baptist Church County of Buncombe 3b. Deed Book and Page No. 1944/0444 1119/407 3c. Responsible Party (for LLC if applicable): pastor Joel Burton Greg Isreal, Dir. General Services 3d. Street address: 943 Warren Wilson Rd. 200 College St., #300 3e. City, state, zip: Swannanoa, NC 28778 Asheville, NC 28801 3f. Telephone no.: 828 -458 -1700 828 - 250 -4233 3g. Fax no.: 3h. Email address: Page 1 of 12 PCN Form — Version 1.3 December 10, 2008 Version 4. Applicant Information (if different from owner) 4a Applicant is ®Agent ❑ Other, specify - 4b Name 4c Business name (if applicable) 4d Street address 4e City, state; zip 4f Telephone no 4g Fax no 4h Email address 5. Agent/Consultant Information (if applicable) 5a Name John C Was 5b. Business name (if applicable) McGill Associates, PA 5c Street address 3764 Rominger Rd 5d City, state, zip Banner Elk, NC 28604 5e Telephone no (828) 297 -6946 5f. Fax no 5g Email address john vdas @mcgdlengineers.com Page 2 of 12 B. Project Information and Prior Project History 1. Property Identification 1a Property identification no (tax PIN or parcel ID) 9689 -25- 2187 -00000 9689 -14- 2450 -00000 lb Site coordinates (in decimal degrees)- Latitude* 35 611997 Longitude - 82 428664 (DD DDDDDD) ( -DD DDDDDD) 1c Property,size Project corridor runs along boundary between two,parcels and is approximately 300 feet -long by 75 feet -wide 2. Surface Waters 2a Name of nearest body of water (stream„ river, etc) to Beetree Creek proposed project 2b Water Quahty,Classification of nearest receiwng,water C 2c, River basin map is available at French Broad http //h2o.enr state= us /adman /maps/ Page 3 of 12 PCN Form — Version 1.3 December 10, 2008 Version 3. Project Description 3a- Describe the existing conditions on the site and the general land use in the vicinity of the protect at the time of this application The Prolect'Site consists,of approximately 290 linear feet of'Beetree Creek between Warren Wilson Road and the Swannanoa River The Site is adiacent,to the access road to Owen Park (west) and'a mostly wooded area owned by Gods Way Baptist Church (east) Beetree Creek is a Class C stream with an approximate drainage area of 14 sq mi at the Protect Site The - entire project area is within the 100 year floodplain and the associated regulatory floodway. The right bank of Beetree Creek is severely eroded, near vertical. and 8,to 10 feet,high forroughly 150rfeet through the,Site. There is strong evidence of channel migration toward to the Owen Park access road, at one location a storm drainage pipe protrudes from-the eroded right bank by about 8 feet The left'bank of Beetree Creek through this reach is mostly stable The left overbank region is thickly vegetated and.debris,strewn: much of this debris now acts.as a bamer to flood flows, preventing ready access to the bulk of the mapped floodglain The downstream portion of the voiect site is less severely degraded but there�is an area of'approximately 50 linear feet with severe erosion and +undercutting along the left bank A large gravel bar'has formed from the right bank %,of theway across the normal flow channel forcing all normal flows up against the eroding left bank Land use in the vicinity of the Project Site is mixed with industrial, commercial, both high and low density residential, and, forested open space 3b Ust'the total °estimated acreage of all existing wetlands on the property 01 acres (465 sq -ft). a small'linear area located'in floodplain on left bank 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property Approximately 290 linear feet 3d Explain the purpose of the proposed project- The purpose of the project is to stabilize a severely eroding stream bank and protect the existing access road to Owen Park 3e Describe,the overall protect in detail, including the type °of equipment to be used The,oroiect.will involve the reconstruction of the right bank of Beetree Creek for approximately 160 linear feet, two rock (J -Hook) vane structures will also be,added in this reach.to further protect the stream bank and help reestablish bed form. The proposed right, bank section will be about 10 % feet -tall in the severely eroded areas and will consist of a_boulder toe ,base (3'/ feet above stream bed or % bankfull), reinforced sod lift section (apwox 3 feet, above boulders or twice bankfull), and a standard compacted sod section 'to the top (see plans and details attached) The - proposed bank section will ,extend approximately 13 feet channelward of the existing stream bank in the'most�severely eroded areas (downstream), towards the upstream end the proposed bank will taper back towards the existing bank The proposed bank will be vegetated with herbaceous, species and live-stakes Downstream of the proposed reconstructed right bank, the left bank will be stabilized; and a large gravel bar will be partially removed This work will involve approximately 90 linear feet of channel and will consist of adding a few small boulders and'cobbleto stabilize the undercut bank area and shaping,the remaihing eroded banks. The gravel /cobble bar that has,formed in the right half of the channelwill be partially removed and shaped to align with the shifted channel section upstream The thalweg will be shifted from the left bank to the center or right of center All disturbed areas on the left bank will be stabilizedwith icoir matting and seeded6with a riparian seed mix (see attached plans and.details) Construction seguenang will be specified to minimize the amount of instream work necessary (see attached) Gravel /cobble berms will be installed,to isolate the work areas for the boulder toe wall and the left bank stabilization activities, the construction of the,J -Hook vanes will need to occur in flowing'water Page 4 of 12 4. Jurisdictional Determinations 4a Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / project (including all prior phases) in the past? ❑ Yes ® No ❑ Unknown Comments McGill Associates. Environmental Services delineated a small area of wetlands on the left bank 4b If the Corps made, the jurisdictional determination, what type ❑ preliminary ❑ Final of determination was madel 4c If yes, who delmeated'the jurisdictional areas? Agency /Consultant'Company McGill Associates. Environmental Services Name (if known) Sean Martin Other 4d If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation Data sheets and JD'forms attached 6. Project History Za Have, permits or certifications been requested, or obtained for ❑ Yes ® No ❑ Unknown this project (including all prior phases) in the�past? 5b If yes, explain in detail according to "help file" instructions 6. Future Project Plans 6a. Is.this a phased project? ❑'Yes ® No 6b If yes, explain Page,5 of 12 C. Proposed Impacts Inventory 1. Impacts Summary la Which sections were completed,below for your project (check all that apply) ❑ Wetlands ® Streams - tributaries ❑ Buffers ❑ Open Waters ❑ Pond Construction 2. Wetland Impacts If there are wetland impacts proposed on,the site, then complete this question for each wetland_ area impacted ,2a 2b 2c 2d 2e. 2f Wetland impact Type of jurisdiction number — Type of impact Type of wetland Forested (Corps -404, 10 Area of impact Permanent (P) or (if known) DWQ — non -404, other) (acres) Temporary W1 ®P ❑ T grading npanan ❑ Yes ® No ® Corps ® DWQ _ 001 W2 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑, DWQ W3 El P C:1 T ❑ Yes El Corps ❑ No ❑ DWQ W4 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W5 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W6 '❑ P ❑ T ❑ Yes _ ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 001 2h Comments `W1 is,a small area of wetlands within floodplam of'Beetree Creek; this area will be impacted_ by grading activity'associated with,.shifting the channel east Wetland impacts to be permitted under a NWP -18 3. Stream Impacts If there,are perennial or intermittent stream impacts (including temporary impacts) proposed on the =site, then complete this question for all stream sites impacted 3a 3b 3c 3d. 3e. 3f 3g. Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact number - (PER) or (Corps - 404, 10 stream length Permanent (P) or intermittent DWQ,— non -404, width (linear Temporary (T) (INT)? other) (feet) feet) S1 ®P ®T Grading and fill Beetree Creek ® PER ❑ INT ® Corps ®DWQ 40 290 S2 ❑ P ❑ T ❑, PER ❑ Corps ❑ INT ❑ DWQ S3 ❑ P ❑ T ❑ PER ❑ Corps ' ❑ INT ❑ DWQ S4 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑_DWQ S5 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑, DWQ S6 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h Total stream and tributary impacts 290 31 Comments, Stream Impacts arerassociated with channel bank reconstruction, associated channel shift, rock vanes, and access Stream impacts,to be permitted under a NWP -27 Page 6 of 12 4. Open Water Impacts If there -are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U'S then individually list all open water impacts below 4a 4b 4c 4d 4e Open water Name of waterbody impact number — (if applicable) Type of impact Waterbody type Area of impact (acres) Permanent (P) or Temporary 01 ❑P ❑T 02 ❑ P ❑ "T 03 ❑ P' ❑ T 04 ❑ P'❑ T 0. Total open water,impacts 4g 'Comments S. Pond or,Lake Construction If pond or lake construction proposed, then complete the chart below. 5a 5b 5c 5d. 5e. Wetland Impacts (acres) Stream Impacts (feet) Upland Pond ID Proposed use or purpose (acres) number of pond Flooded Filled Excavated Flooded Filled Excavated Flooded P1 P2 5f. Total 5g Comments 5h Is a,dam'high hazard permit required ❑ Yes ❑ No If yes, permit ID no 51 Expected pond surface area (acres) 5j Size of pond watershed (acres) 5k Method of construction 6. Buffer Impacts (for DWQ) ,If project will impact a protected riparian buffer, then complete,the chart below If yes, then individually list all buffer impacts below If any impacts require mitigation, then you MUST fill out Section D of this,form 6a. ❑ Neuse ❑ Tar - Pamlico ❑ Other Project is in which protected basins ❑ Catawba ❑ Randleman 6b 6c 6d 6e 6f 6g Buffer impact number — Reason Buffer Zone 1 Impact Zone 2 impact Permanent (P) or for Stream name mitigation (square feet) (square feet) Temporary impact required? 131 ❑P ❑T ❑Yes ❑ No B2 ❑P ❑T ❑Yes ❑ No B3 ❑P ❑T El Yes ❑ No 6h. Total buffer impacts 61 Comments Page 7 of 12 D. Impact Justification and Mitigation 1. Avoidance and Minimization 1 a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. The,'mitial proiect concept was to construct a concrete retaining wall adjacent to the Owens'Park access road and this project moved all the way to bid phase before it was re- evaluated to see if a more natural approach could provide the same level of protection The current plan reflects this more natural design approach The,current plan shows a hard armored toebut with vegetated bio-engineered slopes above The existing stream alignment is causing accelerated, left bank erosion downstream of the severely eroded-right bank,because the channel,has migrated to the right, there is a sharp bend to the left that is causing the left bank problems The proposed work will shift the upstream portion of the channel back to the left, eliminatinq the sharp bend and eliminating the stress on the left bank b Specifically describe measures taken to avoid or minimize the proposed`impacts through construction techniques Beetree Creek'is too big to pump the flow around the work area but construction, sequencing will minimize the amount of mstream,work needed to complete the,iob 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State 2a Does the project require, Compensatory Mitigatiomfor impacts to Waters of the U S or Waters of the, State? ❑ Yes ®'No 2b If'yes, mitigation is required by (check all that apply) ❑ DWQ ❑ Corps 2c If yes, which mitigation option will be used for this projects ❑ Mitigation bank ❑Payment to in-lieu fee program ❑ Permittee Responsible Mitigation 3. Complete If Using, a Mitigation Bank 3a Nam&of Mitigation Bank 3b Credits Purchased (attach receipt and letter) Type Quantity 3c Comments 4. Complete if Making a Payment to In -lieu Fee Program 4a Approval letter from in- lieu,fee program is,attached ❑ Yes 4b Stream mitigation requested- linear feet 4c If using stream mitigation, stream, temperature, ❑ warm ❑cool ❑cold 4d Buffer mitigation requested (DWQ only). square,feet 4e Riparian wetland mitigation requested acres 4f Non - npanan wetland mitigation requested acres 4g Coastal (tidal) wetland mitigation requested, acres 4h Comments Page,8 of 12 PCN Form — Version 1 3 December 10, 2008 Version 5. Complete if Using a Permittee Responsible Mitigation Plan 5a If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan 6. Buffer Mitigation (State'Regulated Riparian Buffer Rules) — required by DWQ 6a Will the project result in an impact within a protected riparian buffer that requires buffer mitigation? If yes, you will have to fill out this entire form — please contact the State for more information ❑ Yes ® No 6b If'yes, then identify the square feet of impact,to each zone of the riparian buffer that,regwres mitigation. Calculate the amount of mitigation required Zone 6c Reason for impact 6d Total impact (square,feet) Multiplier 6e Required mitigation (square feet) Zone 1 3 (2 for Catawba) Zone 2 1 5 6f Total buffer mitigation required: 6g If buffer mitigation is required, discuss, what type of mitigation is proposed (e g , payment to private mitigation bank, permittee responsible npanan buffer restoration, payment into,an approved in -lieu fee fund) 6h Comments- Page 9 of 12 E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan la Does the project include or is it adjacent to protected riparian buffers identified ❑ Yes ® No within one of the NC Riparian Buffer Protection Rules? lb If yes, then is a diffuse flow1plan included? If no; explain why ❑ Yes ❑ No Comments - 2. Stormwater Management—Plan 2a What is the overall percent imperviousness of this project? 0% 2b Does this project require a Stormwater Management Plan? ❑ Yes ® No 2c If this project DOES,NOT require a Storrnwater Management Plan, explain,why This is a stream bank stabilization „protect and does not, involve any changes to impervious cover within the watershed 2d If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of 'the plan. ❑ Certified Local Government 2e Who will be responsible,for the review of the Stormwater Management Plan? ❑ DWQ Stormwater Program ❑ DWQ 401 Unit 3. Certified Local Government Stormwater Review 3a In which local government's jurisdiction, is this, project? Buncombe ❑ Phase II 3b Which of the following locally - implemented.stormwater management programs ❑ NSW ❑ USMP apply °(check all'that apply) ❑ Water Supply Watershed ❑ Other: 3c Has °the approved Stormwater Management Plan with proof of approval been ❑ Yes ❑ No attached? 4. DWQ Stormwater Program Review ❑ Coastal counties ❑ HOW 4a Which -of the following state - implemented stormwater management programs apply ❑ ORW (check all that apply) ❑ Session Law 2006 -246 ❑ Other 4b Has the approved Stormwater Management Plan with proof of approval been ❑ Yes ❑ No attached? 5. DWQ 401, Unit Stormwater Review 5a Does the,Stormwater Management.Plammeet the appropriate requirements? ❑ Yes ❑ No 5b Have all of the 401 Unit submittal requirements been met? ❑ Yes ❑ No Page 10 of 12 PCN Form — Version 1,3 December 10, 2008 Version F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1,a Does the project involv&an expenditure of public (federal /state /local) fundsor the ® Yes ❑ No use of public (federal /state) land? lb If you answered "yes °'to the above, does the project require preparation of an environmental document pursuant to the requirements of the National or State ❑ Yes ® No (North Carolina) Environmental Policy Act (NEPA/SEPA)? 1 c If you answered "yes "',to the above, has the document review been finalized by the State Clearing House? (if so, attach a copy of the NEPA or SEPA final approval ❑ Yes ❑ No letter ) Comments 2. Violations (DWQ, Requirement) 2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H 0500), `Isolated Wetland Rules (15A NCAC 2H 1300), DWQ Surface Water or Wetland Standards, ❑ Yes ® No or Riparian Buffer Rules (15A NCAC 2B .0200)? 2b Is this an after - the- fact,permit application? ❑ Yes ®'No 2c If you answered "yes"-to one or both of the above questions „provide an explanation of the violation(s) 1 Cumulative Impacts (DWQ Requirement) 3a Will,this project (based on past and reasonably anticipated future impacts) result in ❑ Yes ® No additional development, which could impact nearby downstream water quality? 30 If you answered "yes” to the above, submit a qualitative or quantitative cumulative,impact analysis in accordance with the most recent DWQ policy If you answered "no," provide a short narrative description This,is a streambank stabilization project and will have no effect on the development potential of surrounding properties 4. Sewage Disposal (DWQ Requirement) 4a 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 NA Page 11 of 12 PCN Form — Version 1 3 December 10, 2008 Version 5. Endangered Species,and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or ❑ Yes ® No habitat? 5b. Have you,checked with the USFWS concerning Endangered Species Act ❑ Yes ® No impacts? ❑ Raleigh 5c. 'If yes, indicate the.USFWS Field Office you have contacted. ❑ Asheville 5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? United States Fish and Wildlife Service- http- //wvvw.fws. gov/ raleigh /species/cntylisttbuncombe.html 6. Essential Fish Habitat (Corps Requirement) 6a: Will this,prolect occur in or near an area designated,as essential fish habitat? ❑ Yes 1Z 'No 6b. What data sources,did you use to determine whether your site would impact Essential Fish Habitat?, National Oceanographic and Atmospheric Administration, Essential Fish Habitat Conservation and Protection Mapper http: //ww*.habitat.noaa.gov/ protection /efh/habitatmapper .,htmi 7. Historic or Prehistoric Cultural Resources (Corps Requirement) 7a. Will this project occur1n ornear an, area that the,state, federal or tribal governments have designated as,having „historic orcultural preservation ❑ Yes ® No status (e.g , National Historic Trust.designation or properties significant in North Carolina'history`and archaeology)? 7b. What data,sources did you use to determine whether your site would impact historic or archeologicalsesources? North Carolina State Historic Preservation Office- http: / /gis.nedcr.gov /hpoweb/ 8 -Flood Zone Designation (Corps Requirement) 8a. Will this project occur in a FEMA- designated 100 -year floodplain? ® Yes ❑,No 8b If yes, explain how project meets FEMA requirements: Project in process obtaining a Floodpalain Development Permit through the-Buncombe County Planning Inspections Department: a No-Rise certification is currently under=review. 8c. What;source(s) did you,use to make the floodplain determination? North Carolina Flood Mapping Program, Flood Risk Information System- http: / /www ncfloodmaps.com/ CJ_ Ig Applicant/Agents Printed Name plicant/Agents Signature Date (Agents signatureft valid only if an authorization letter from the applicant is' pmvided Page 12 of 12 T _ 0.• , PROJECT NAME: BM7REE MM,BANK STABILIZA7ION PROPERTY LEGAL DESCRIPTION: PIN# Mf392MBOO8tIiID j cR it MU s� 1 sm' 1 i l: Please Print Paoperty.Owner /Representative: MR. JOEL BURTON -- -(If Representative) Title: P AP The undersigned, regwbmW' property owners of the above noted property, do hereby authorize (Name of oonsutting firm) to act on my behalf and tike.ali actions nary for the processing, issuance and acceptance of this permit or aon•and any and all standard and special condom ed- property Owner's/Representative's Address (if'different than property above): 'telephone: 2122? ` g� 12 42L We hereby certify the above information submitted In this application Is true and accutrabe-to the bast of oar knowledge. Authormed Signature Date: Env i-ron men taI Plan ninb Finance McGill Associares. P.A. - 3769 Rowinger Road, Banner Elk. \"orrh Carolina _8604 Office: S2.5- 29 7-6946 - Fax: S28-291-2932 McGill A S S 0( I A T L• S AGENT AUTHORIZATION FORM PROJECT NAME: Beetree Creek Stabilization Project PROPERTY LEGAL DESCRIPTION: Easement for access road to Owen Park PARCEL ID. LOT NO. LAN NO. STREET ADDRESS: Easement along access road from Warren Wilson Road to Owen Park and parallel to Beetree Creek — _ Please Print Property Owner /Representative: Greg Isreal (If Representative) Title: Buncombe County General Services Director The undersigned, registered property owners of the above noted property, do hereby authorize John C Vilas and Mark Cathy, PE of McGill Associates P.A. (Contractor / Agent) (Name of consulting firm) to act on my behalf and take all actions necessary for the processing, issuance and acceptance of this permit or certification and any and all standard and special conditions attached. Property Owner's/ Representative's Address (if different than property above): 200 College Street #300, Asheville NC 28801 Telephone: 828 - 250 -4233 We hereby certify the above information submitted in this application is true and accurate to the best of our knowledge. u horized Signature Date: 7 / Authorized Signature Date: Environinentitl ['lanninL, F1 na[11C t l r r 1 / Sou c d by �? centerinies po(ovi N ogy municipal l c i tlariZs ob - edr -- ob�ugh N sp�t>a1 at portal. Parcel -undary ed 6gh'�uncibe Coitnty -!ax ' LOCATION MAP PCN APPLICATION August 2014 Beetree Creek Bank Stabilization OMcGm BUNCOMBE COUNTY, NORTH CAROLINA A S S O C I A T P, S ENGINEER ING-PLANN ING FINANCE nYMDx110!•1 ASYhl1LLG W'DYYI M. 01Y LC!d1`s M9Y J1t'L:1.1'.INMI ti\ t _0 4 -1-1 IN IN WOOD :so J j .7'. 4 �A OTEEN, N.C. 35082- E4 -TF -024 1962 PHOTOHEVISED 1990 DMA 4555 111 SW- SERIES V642 August 2014 Project Area /f • a ■ fl~ 1 • FARM f p Vv 1 mop r w r -4 t .,0 M i + • IL r. i� • s • IV a 01 •.. ■■■■■1� /.N� J ■w■1M. •N■...M •sN.KsM.N. ■/■ \ sag •M 60 go.. ■1■Aq / M oM.. LM ■w N \ Lq..MM.. ! V 4 to o" ... `� W U 250 500 1000 2000 + f" FEET TOPO MAP Beetree Creek Bank StabilizationPCN APPLICATION McGm BUNCOMBE COUNTY, NORTH CAROLINA MASSOCIATES ENGINEERING-PLANNING-FINANCE 551W DSMF .WWMM V[�, MMLM*91Ca4 35° 36' 45" N Ni 35° 36' 39' N 370890 370710 370730 370750 370770 Soil Map — Buncombe County, North Carolina (Beetree Creek Bank Stabilization) 370790 370810 370830 370850 371870 370890 370910 370930 370950 370690 3 N 0 15 30 60 90 A0 50 100 200 3C0Feet Map prop: Web Mercator Corner coo-dilates: WGS84 Edge tics: UTM Zone 17N WGS84 370710 370730 370750 370770 Map Scale: 1:1,250 IF pitted on n landscape (11'' x 8.5') sheer. 370790 370810 t sD.:1 Natural Resources Conservation Service 370830 370850 Web Soil Survey National Cooperative Soil Survey 370870 370890 370910 370930 370950 A A �A 3 A 8/13/2014 Page 1 of 3 35° 3645' N 35° 36' 39' N Sod Map — Buncombe County, North Carolina (Beetree Creek Bank Stabilization) MAP LEGEND Area of Interest (AO1) 0 Area of Interest (A01) Soils Q Sod Map Unit Polygons — Sod Map Unit Lines Sod Map Unit Points Speclal'Polnt Features • Blowout i;' Borrow Prt X Clay Spot Q Closed Depression • Gravel Prt • Gravelly Spot Landfill A. Lava Flow • Marsh or swamp 5e Mine or Quarry Miscellaneous Water Perennial.Water y Rock Outcrop .¢. Saline Spot °S. Sandy Spot Severely Eroded Spot • Sinkhole $y Slide or Slip • Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other SpecialiLme Features Transportation }}} Rads wear Interstate Highways • US Routes Major Roads — Local Roads Background ® Aenal Photography MAP INFORMATION The soil surveys that compnse your AOI were mapped at 1 12,000 Warning Sod Map may not be valid at this scale Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement The maps do not show the small areas of contrasting sods that could have,been shown at,a more detailed<scale Please rely on the bar scale on each map sheet for map measurements Source of Map• Natural l,tesources Conservation Service Web Sod Survey URL http / /websodsurvey.nres usda gov Coordinate System Web Mercator (EPSG 3857) Maps from the Web Sod Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area A projection that preserves area, such as the Albers equal -area conic projection, should be used if more accurate calculations of distance or area are required This product is generated from the USDA -NRCS certified data as of the version date(s) listed below Sod Survey Area Buncombe County, North Carolina Survey Area Data Version 9, Dec 14, 2013 Soil map units are labeled (as space allows)for map scales 1 50,000 or larger Date(a) aerial images were photographed Oct 15, 2011 —Dec 9, 2011 The orthophoto or other base map on which the,soil lines were compiled and digitized probably differs from the background imagery displayed on these maps As a result, some minor shifting of map unit boundanes may be evident USDA Natural Resources Conservation Service Web Sod Survey National Cooperattve,Sod Survey 8/13/2014 Page 2 of 3 Soil Map—Buncombe'County, North Carolina 'Map Unit Legend Beetree Creek,Bank Stabilization usDA Natural Resources Web Sod Survey 8/13/2014 M—M Conservation Service National Cooperative Sod ,Survey Page3 of 3 BeA Billmore loamy sand, 0 to 3 00, 02% percent slopes, occasionally flooded ,IoA lotla loam, 0 to 2 percent slopes, 02 66% occasionally flooded Ud Udoithents, loamy 01 39% .UfB Udorthents-Urban land 22 876% complex, 0 to 5 percent slopes, occasionally flooded Ux 1 Urban land 001 17% Totals for Area of Interest 2.6 � -100.0% usDA Natural Resources Web Sod Survey 8/13/2014 M—M Conservation Service National Cooperative Sod ,Survey Page3 of 3 b z-� 0 z 0 m 0 z 0 0 r- CfQ N uoi)izq igeIs /UL'g )aaJD aawag goangD ;s! ;deg AgM s,PoJ Buncombe County Right of Way for access to Owen Park. • 9689 -25- 2187 -00000 Gods Way Baptist Church 943 Warren Wilson Rd. Swannanoa, NC 28778 Book/Page: 1944 / 0444 tr Source: Buncombe County Tax Mapping, http: / /gis.buncombecounty.org/ Not to Scale 03 d U U 0 a Z��a dP- 0. Z 03 F Source: North Carolina Flood Risk Information System, http: / /www.ncfloodmaps.com/ Not to Scale n f ' God's Way Baptist Church RMcGM PCN APPLIAPPLICATION ON FLOOD MAP Sept. 2014 Beetree Creek Bank Stabilization A S S O C I A T E S BUNCOMBE COUNTY, NORTH CAROLINA ENGINEERING - PLANNING -FINANCE srn.o mgr wa ua rc yoi Mrmiemn Ruu�.cuu, J a ? Z 9 weJ5ad ameinsul poold IengeN VWa-4 Z��a dP- 0. Z 03 F Source: North Carolina Flood Risk Information System, http: / /www.ncfloodmaps.com/ Not to Scale n f ' God's Way Baptist Church RMcGM PCN APPLIAPPLICATION ON FLOOD MAP Sept. 2014 Beetree Creek Bank Stabilization A S S O C I A T E S BUNCOMBE COUNTY, NORTH CAROLINA ENGINEERING - PLANNING -FINANCE srn.o mgr wa ua rc yoi Mrmiemn Ruu�.cuu, Photo One: View looking to the north and upstream from the right eroded bank of Beetree Creek. Access road to Owens Park is seen on the left side of photo. Severe bank erosion is visible in the foreground. Mapped wetland area is visible on the right side of photo in the dense vegetation; floodplain wetland unit. Exposed stormwater pipe visible in center of photo. Photo Three: View looking south and downstream on Beetree Creek. Lower end of severe right bank erosion ending near the leaning tree. Riprap material seen on the right has been put in as temporary streambank armoring. Stream channel makes hard left turn near leaning tree which has caused undercutting along the left bank downstream; not seen in photo. Photo Two: View of severely eroded right bank on Beetree Creek. Exposed stormwater pipe is visible. Pipe is damaged and will be repaired during reconstructed bank stabilization. Photo Four: View looking upstream fifty feet below where Photo Three was taken; leaning tree can be seen in center of photo as a reference. Hard turn in stream channel can be seen in background causing undercutting and erosion of left bank on the right of photo. Additionally, large gravel bar can be seen on the left side of photo; to be graded back removing obstruction. PHOTO SHEET PCN APPLICATION Sept. 18, 2014 BEETREE CREEK BANK STABILIZATION BUNCOMBE COUNTY, NORTH CAROLINA McGill A S S O C I A T E S ENVIRONMENTAL SERVICES 3764 ROMINOER RO. BANNER ELK. NC 28604 PH. (828)297 -6946 \\ \\ 1 / Illll \ 1 111 HARDWOOD 1b" ll►1�111 ,/ i �\1 ` - -' Ily� 111 • \\ • ..an SS SEC CIO 11 1 I 1 / 1111 / /l 11 \\/� CiRO 11 I 1r /' j�\� i ill n1111 HA/ RLAOOPI, D- \ \ 11111 I 11 \�\ '\ �n t11 \\ 1 \ _ II r ` I I11d1 I I„tit�` \� f 11�' r- �\OA� \32 \ 111 �11 1\ `+ I II 1 • q Lpi} 1�^ 1�\ 11� I 1ill i 1 I \AK 36 �\ \'Illjl Normal �lowi �iI - \.`�i l\ I +111,4 \\ g111r Channel , 1I \J --I IRDw00D 35 I _ ,1;1 +1 I 'I����� / ply 1 CHERRY 22" TRIPLE Illi +l / 1 1 1 A i // 111i 1 1� - -- I\ 1 \ • 1` \^1t1pra ate' -4,4 11 I Asphalt Drive '�Pkk 1\ 1 }I11 I \``A II I\W 1 I�1 \\\ BOLLARD 1` •• \\ \� • \ It • \ • 11 \\ \ \ \ \� \ \ \\ \\ W 1 1 lI\. \ 1 \ I ` \` 1 1\. ` O \ \ j ' \` • `\ 1 ; \ \ \\ +1\A\ \ \\ �IRC�1s' • Appro�Tit ate \\ \ 1\ \ \ \q + \� \ r 1, \ ~Bankfull \ \\ \ \ \\ \\ \\ 1, `\ ` \---, -- i� \ ` \\` \ \11 1\ ii ! \ \I / \ \ \II III\ 111 r° � +1 ' -� / ` y� \ 111 11 \ 1 I \ `. \1 \ \\ \ - \I� \ \ \ 1 I • / \ ` \ \ \ \ \I 'IIC \1 A + 1 \ `\ � \ \ \\ \\\ \\ \ \ c r \ I 1 \ \ \ \ \ \\ -\, \ \ ■ 1 \ \ \\ \\ \\ \ 1\ \ \ \ • \ I SYCAMORE 15" ` \` \� . \,- \ \ �l 1 1 . 1:1 \\ \ \\'� ,. 1 \ \ \\ II / / `\ o � \\ \\ ,\ e• r • \ \\ y - _ SYCAMORE 15" SYCAMORE 10" n\ \ \� • • X \/ rS�'Di 1irL� 1r 0 A' \ \ \ ` \ \ ■ \ \ \ • \ \ CHERRY 25 'WAD • • • • LLARD WALNUT 20" ^GROSS BbPLAR 28" BOLLARD • • • o G,C \pN POPLAR 20" ` ` \, LOCUST 6" PO \J AROWOOD 2•" A SYCAMORE \ \ \ \ \ \.\ • • \\ • • MAPLE` \30" DBL 'L / J • ,MAPLE 20" TRIPLE / 1 / 1 / 1 // FI I / / ,I\ `.- _ __ - I S�G � \� I I \\ MAPLE ' �j \\ • \ GRO \\ • • COTTONWOOD 16" • • • • Exi tin�c 15- PIPE •-• r� 1 *POD \\ \, \eu,cy.6 .. BIRCH 6 • -_ • r�I ^\�`\_�� • • • • • • • • • HARDWOOD) K�cD3>:1a _ • • • I / / ! 1 -' . • 4• 4 D PLE 3 • \ `� .�\\\ • N\ \•\ HICKORY 15 •\ \q,, \ -WALNUT 15" �a,� \\ \ 1 \\ �q TC ``SYC�IMORE 36" `• l `\ ��\ 1(f 11 11 II Ill LP - -� • • • / • / • / • / • / • • / / /// o 3�- 'A(APLE 6" G'`\ \ ��^ • MAPLE 36" Cv \ \" CHERRY 15" Gj • 1 • .• • • • \ • •' \` • • 1 \ \ • ▪ • \\ `•\ \.j'' 1 • • 1 •yF • \ t ` N. • • • \ \ \\ \ 1�L GraOel Extent \ • `\ ` \`.��,� A- `\ Graahic Scale Feet 0 10 20 40 1' Contour Interval • GRAVEL ■ • \ c 081 DEAD 11 �O� 18 SYCAMORE - 32" • • • • U S \ \\ SYCAMORE 23" \ I —1\\ HARDWOOD 6" \ • • ` • • \ \'7Fr' \\ \\ �v \ • N. ( \\ • • • \ \ ` \ .\ ` \z \ �`�-- • 1 \ ` ` `` ` • • 's- •• \ \ • \ 1s I 1 YCAM E 50\‘081.‘" • �`� \\ - • • I • • • q. • \ 4 • • \S • • `\ `\ ` \\ \� Normal ` • • `\ `� `tChanne�� C: \: • \! `\\ z g M S \ \ \\ �r �u�'1 I till\ �� I \I \l1\ \ / III \- ` 1 j 111 �\ r E N I1 I I I I / Il�ll II 111 \ \ _co, R�55 C�10 11111 / 1' \� \\ I I I^ 1111- � \ \ 111111 III l_/ 1111 ` \- III \ \ \ O Illllr \�I / / -- \ \I I `III I I 1111 \\ / ` \ 1 I On J 1 iiI "— \. il / / / SSMH 0 4 -o O 2' </, i2\ CP/NL GPS RIK N 7\ 'Brush /Debris Clearing Limits; Large Trees Outside Gradir Limits To Remain Slid 1 1 WETLAND IMPAOT \W -1 Boulder Toe Stabilization With Reinforced Soil Lifts Area (See Cross — sections and Boulder Toe Detail) Ex. 15" CMP— replace damaged section, install with outfall on top of proposed boulder wall. Additional rock will be added below pipe if invert is above boulder wall. (Refer to Reconstructed Right Bank Typical Section) Gra•hic Scale Feet 10 20 40 1' Contour Interval IMPACT TABLE Stream Impact S -1: 265 I.f. Wetalnd Impact W -1: 0.01 —ac. (465 sf) CONSTRUCTION NOTES f fit P 1I F / / //1 Ii I o\ \ / Low Bank T801 \ Be Regrad�d \\` \ (See Stabilize . cci Eroded Left �o� \ Bank Typical) <(/ .\\ 6) 1 Boulder Toe Area: 1) Rough grade new channel along left side of stream. 2) Create a non — erodible berm to shift flow left and isolate boulder toe area. 3) Install Boulder Toe Stabilization. (Refer to Boulder Toe Stabilization with Soil Lifts Above detail) 4) Simultaneously complete installation of Soil Lifts above boulder toe (refer to Boulder Toe Stabilization with Soil Lifts Above detail) and installation of two J —Hooks (refer to J —Hook Rock Vane detail). Left Bank Stabilization Area: 5) Use gravel bar material to construct berm to isolate left bank stabilization area and shift flow to the right side of channel. 6) Add boulders in undercut bank area and shape left bank. 7) Stabilize disturbed areas with coir mat 40 or equivalent; seed with temporary erosion control mix; overseed with native riparian seed mix (ERNST 304 or similar). \, � .�eee40* \" e ; Proposeg\Grc <el • ■ � \ Bar Rembv�.1 \ ` ( ee Stabilize\ \\ \ Eroded Left \\ B1 nk Typical) \\ \\ \\ \�\�► "N� �\ P \ • N \iv \ \ '. \ \ o� \ N _N \ \I 1J1 2154 2152 2150 2148 2146 2144 2142 2156 2154 2152 2150 2148 2146 2144 2142 Please note, Cross - sections 4 and 6 are outside the project limits and are not shown on permit drawings. 0 +00 0+20 0 +40 0 +60 0 +80 1 +00 1 +20 1 1 1 CROSS SECTION 3 CROSS SECTION 1 i CROSS SECTION 2 SCALE'. HORIZ 1" =20 VERT.1'.2' SCALE: HORIZ 1 "• 2e VERT.1 "• T SCALE: HORI2. 1" • 29' VERT.1" • 2 1 / Approximate Bankfull I / f ,— / Approximate Bankfull / ompacted Sol Erosion Control Fill with — Approximate Bankfull Fill witty ' I aW Sol - Erosion Control Matting Matting Approximate Bankfull Existing Streambed 1 1 _ 7 \ / 1 r j Rein Soil orced Lifts Proposed J -Hook Rock Vone Reinforced Soil - with Lifts Live (See" ` / -with Live Stakes (See Detail) Proposed Streambed :dr :.'. %. ~ 'Pik >' Pr. e-4': -J e-et'" 1 Boulder Toe with Coarse I,1 is.eP ,0 _ Aggregate Backfill (see Detail) -.::.• '-'• ∎' `d-'/" !� ;; '�" F Proposed Streambed Proposed J -Hook Rock Vone - Detail) 0 +00 0+20 0 +40 0 +60 0 +80 1 +00 1 +20 0 +00 0+20 0+40 0+60 0+80 1 +00 1 +20 2156 2154 2152 2150 2148 2146 2144 2142 1 +40 2154 2152 2150 2154 2152 2150 48 2148 2146 2144 2142 2146 2144 2142 2150 2148 2146 2144 2142 1 1 1 CROSS SECTION 3 I '- CROSS SECTION 5 i CROSS SECTION 2 SCALE'. HORIZ 1" =20 VERT.1'.2' SCALE: HORIZ 1 ' • 20' VERT.1 "• 2 SCALE: HORI2. 1" • 29' VERT.1" • 2 1 / Approximate Bankfull I / f ,— / Approximate Bankfull / / Compacted Fill witty / I ' I Sol - Erosion Control Matting Approximate Bankfull � 1 1 _ 7 / • Exist ng Streambed Proposed J -Hook Rock Vone Reinforced Soil - with Lifts Live (See" 0 +00 0+20 0+40 0+60 0+80 1 +00 1 +20 2156 2154 2152 2150 2148 2146 2144 2142 1 +40 2154 2152 2150 2154 2152 2150 48 2148 2146 2144 2142 2146 2144 2142 2150 2148 2146 2144 2142 0+00 0+20 0+40 0+60 0+80 1 +00 1 +20 1+40 1+60 I '- CROSS SECTION 5 i CROSS SECTION 2 SCALE: HORIZ 1 ' • 20' VERT.1 "• 2 SCALE: HORI2. 1" • 29' VERT.1" • 2 1 Approximate Bankfull ,— / Compacted Fill witty / I Sol - Erosion Control Matting Approximate Bankfull — _ / Exist ng Streambed Proposed Removal Gravel Reinforced Soil - with Lifts Live (See" Stakes Detail) I,1 -.::.• '-'• ∎' `d-'/" !� ;; '�" F Proposed Streambed Boulder Toe with Coarse _ Aggregate Backfill (see - Detail) Proposed Thalweg Existing Thalweg 0+00 0+20 0+40 0+60 0+80 1 +00 1 +20 1+40 1+60 0+00 0+20 0 +40 0+60 0 +80 1 +00 2150 2148 2146 2144 2142 2154 2152 2150 2148 2146 2144 2142 I '- CROSS SECTION 5 SCALE: HORIZ 1 ' • 20' VERT.1 "• 2 1 Approximate Bankfull ,— / / I 1 41 Existing Gravel Bar I L Proposed Removal Gravel of Bar 0+00 0+20 0 +40 0+60 0 +80 1 +00 2150 2148 2146 2144 2142 2154 2152 2150 2148 2146 2144 2142 2154 2152 2150 2148 2146 2144 2142 2: 1 0 ■ McGi Gri A S S O C I A 1 L 0 Compacted Soil Fill with Erosion Control Matting and Seeding CO -••,J = CT and Add Species) /\ Active •_ N U D I. C 0 0 N O fn 0 Overbank ,�Floodplain (Seed Woody High Flow and Mat) Normal Flow Channel I (Non— Vegetated) Existing // / Approx. Bankfull BEETREE CREEK BANK STABILIZATION BUNCOMBE COUNTY NORTH CAROLINA Reinforced Soil Lifts with Live Stakes Proposed \ ;j j j / / / / / /AIIL .•�. O • 3! :..:. ,. .._.• Ex. 15 CMP— replace;..:. damaged section, install with outfall on top of proposed boulder wall. Additional rock will be added below pipe if invert is above boulder wall. %rte -41• Boulder Toe xl'�`! °'':' ��� , ;. Fray _;^ with Coarse Aggregate Backfill O- 0 CL RECONSTRUCTED RIGHT BANK TYPICAL SECTION SEPTEMBER 2014 ems. tir all Channel Shifted Left — Match Existing Thalweg Elevation 0 +00 0 +20 0 +40 0 +60 0 +80 1 +00 1 +20 2150 2148 2146 2144 2142 / Active High Flow (Seed and Mat) '�... C • ,,Normal,�EFlowl Channel ;);'," ''(Non; =, :; ,r,, 'Vegetated),` – ` 'a- Illo Existing' "Grassed,7;,.,„ 'and `;Stable �( LOverbanIs , -- ; ;,Regio`n; ;;, \ Proposed —Ow xistir Gravel Bar g Existing Eroded and Undercut Bank ' =' .•,:1 BUNCOMBE COUNTY NORTH CAROLINA • --► - Regrade ;Gravel, Shi ft" T ialweg 'Center. o Chann'el,7t' Bar` _' Toward: "Add'Medi4m`,lBoulders, n,Filli in Undercut:; Area; Voids °and 7ShaperwitKt, G avef•,CotibleVateriar Removed ±From Gravel Bar;, Ma`ti,,and'A -' ;` Revegetate °'Above, vati J; Notmal:Flow :`L-'ine -4 - - - TYPICAL SECTION SEPTEMBER 2014 0 +00 0 +20 0 +40 0 +60 0 +80 1 +00 Erosion Control Mat (See Notes) • • • • 2 1 Top of Bank 7!I � Live Stakes Existing Bank Cross- section .- / Boulder Dimensions Table Description Dimension Boulder Length 4 -6' Boulder Width 2 -3' Boulder Thickness 1 -2' Dead Stout Stakes Coir Mat Geotextile Wrapped Soil Lifts (See Notes) Approx. Bankfull Temp Bench for Construction Access Approx. Streambed Elev. 31 -41 Approx. Normal Flow Approx. Streambed Non -woven Filter Cloth (See Notes) Ballast Rock Backfill Construction Notes 1. Grade. back streambank to allow access to toe of slope, create a berm using non - erodible materials to isolate the work area to prevent sedimentation of river. 2. Outer edge of boulder wall and top elevation of boulder wall will be field located by engineer or designer. 3. Footer rocks for boulder wall shall be installed 2' below streambed unless bedrock is encountered. 4. Geotextile non -woven filter fabric (Mirafi 1100N or similar) shall be installed between boulder wall and soil bank, washed ballast stone (3 -6 ") shall be placed behind boulderwall to fill voids. 5. Construct boulder wall to deigned elevation; wall slope should be roughly 0.5:1. 6. Place coir mat geotextile (900 Coir Mator equivalent) over header boulder with back edge anchored behind boulders using dead stout stakes. Set batter board with desired soil lift face height (12 " -16 ") along front edge and drape coir mat overhanging board. Place topsoil fill to designed vertical depth (12 " -16 ") and,tamp firmly to 85 -90 percent standard Proctor density (ASTM.D698) Pull coir mat back to existing slope face covering soil lift(and staple at 2 -foot intervals. Repeat process until designed soil lift section is complete. Maintain 2:1 slope through soil lift section based on soil lift height and setback distance between lifts. 7. Add topsoil fill above soil lift section in compacted layers to tie into top bank elevation; maintain 2:1 slope. Stabilize with erosion control mat (Double sided Straw Erosion Blanket) and staked according to manufacturers recommendations Seed topsoil fill slope and soil lift section with erosion control mix and overseed with Native NC Mountains Riparian seed mix (ERNST seed mix #304 or similar). 8. Live stakes shall be soaked in water 24 -48 hours prior to installation. Live stakes shall be planted in the dormant season (October 1 through May 1). Live stakes to be tamped into upper edge of lift face at right angles to the slope, minimum depth of 18" with 6" of stake end protruding from the ground Live stakes should be spaced at 2' intervals along soil lift horizontal rows. Install Footer Boulders Approximately 2' Below Streambed Boulder Toe Stabilization with Soil Lifts Above: Live Stakes Revegetation Not To PCN'APPLICATION Sept. 2014 BEETREE CREEK BANK STABILIZATION c Gill Scale A S S O C I A T E S BUNCOMBE COUNTY, NORTH CAROLINA ENVIRONMENTAL SERVICES _ 3761120141NUER RD R 2NNERELK NC 26604 PH MI) 297 6946 McGioll A S S O C I A T E S J -HOOK ROCK VANE DETAIL ENVIRONMENTAL SERVICES 3764ROWNGERRD BANNER ELK, NC M604 (828)297 -6946 PLAN VIEW 1/3 1/3 BANKFULL BANKFULL TOE OF BANK o!-30* .B, 4 � 3 RLTER ,FABRIC I + a DOTER ROCKS COARSE BACKR SILL STREAM FLOW ANCHOR SILL 4 -6' INTO BANK BANKFULL M1DTH PROFILE VIEW VANE TOP ELEV 'BACKFILL BANKFULL ELEVATION VANE ARM SLOPE 2 -5X % ('A' / 'B') CONSTRUCTION NOTES 1 Excavate trench ,along bottom of stream bed to bankfull elevation on the stream bank for rock vane. Trench depth should be excavated to proposed footer elevation 1/3 2. Place one course of footer rocks to proposed BANKFUU. footer depth (2' below streambed) No gaps between boulders. 3. Install filter fabric, (Mirafi 1000N or equivilant). 4. Place coarse backfill upstream of footer boulders (washed gravel or stream gravel). 5. Install header rocks on top of footer rocks so that half of each header rock overlaps the footer rock; header boulders should rest on coarse baccfill. Header boulders should span seams of footers. Offset the header rocks in an upsteam direction. No gaps between boulders. 6. Rode vane to intersect the stream bank, at or near benkfull elevation (shown as 'A' on details) Sill rocks to ,be embedded 4 -6 feet In stream bank. 7. Hook boulders should be placed atop footer boulders with a gap of approximate I to, I — HEADER RO S boulder dimaeter (6 " —B') between each header rock. Hook boulder terminal elevation per design (shown as 'C' on details). 8. Filter fabric (Mirofi 1000N) shall be used Ito seal the gaps between boulders and under coarse bockfnll upstream of the vane arm. No filter fabric should be visible in the finished work; fold, tram. or tuck edges as needed. MATERIAL SPECIFICATIONS_ 1. Boulders: Footer and header rocks must be large enough to achieve design height and resist movement during peak flow events. Boulders should be rectangular and uniform in shape and size. 2. Coarse aggregate: Salvaged alluvial material during trenching can be used or washed railroad ballast 3 Filter fabric: 10 -12 oz. non —woven geo— textile specific to aggregate separation (Miraft 1000N). DIMENSION'S TABLE DESCRIPTION DIMENSION Boulder Leng 4-6' Boulder Width 2 -3' Boulder Thickness 1 -2' Bankfull Elevation To Be Determined Vane Arm ,Length 50' Vane Arm Top Elevation 'A' To Be Determined Vane Arm, Terminal Elev. 'B' To Be Determined Sill Length 4 -6' Vane Arm Angle to Stream Bank 20 -30 degrees Vane Arm Slope to Stream Bed 3 -5% Hook Terminal Elevation 'C' To Be Determined VANE Hook Boulder Gap Width 6 -8" TERMINAL ELEV. 'B' r, NORMAL 'C' HOOK TERMINAL ELEV 2' BELOW STREAMBED ELEVATION NC IDWO Stream Identification Form Version 4.11 Date: g_ - )c = Project/Site: gee-�cee G «� ,zc ,Latitude: 39, (o tao n Evaluator: 1 `l S_ trong County: 3wJc.o Mid Longitude: Sa , Total Poirds: 1 Stream Determination (cir Other fee} cee Stream is at least intermittent if 2:19 or perennial if 2:30* 4 Ephemeral Intermttten Perennial e.g Quad Name: 4'`2e k A. Geomorphology Subtotal = Absent Weak Moderate S_ trong 18 Continuity of channel,bed and'tiank 19. Rooted upland plants in strearj 0 1 2 3 2. Sinuosity of channel along thalvbeg 0 0 1 2 3 3. In- channel structure: ex. rifflel*l, n I ool sequence step -pool, 0 1 2 1.5 4. Particle size of stream substrate 0 1 2' 3 5. Active /relict floodplain _ _ _ 0 1 2 3 6. Depositional'barsfor benches LOO 0 1 2 3 7. Recent alluvial deposits 0 0 2 3 8. Headcuts _ 0 1 2 3 9. Grade - control 1.5 0 0.5 1 1.5 10. Natural valley 0 0.5 1 _ 1.5 11. Second or greater order chanriei No = 0 = a arty iaal ditches are not rated; see discussibns,in B_ Hvdroloav (Subtotal = -A manual . S ) 12. Presence of Baseflow I 0 1 2 G 13. Iron oxidizing bacteria 19. Rooted upland plants in strearj 0 1 2 3 14. Leaf litter 0 1. 1 0.5 0 15. Sediment on plants or debris 2 0 0.5 1 1.5 16. Organic debris lines or piles 0 0.5 1 1.5 17. Soil =based evidence of high woter table? N6=0 Yes = 3 C.' Bioloav (Subtotal = it U� G 1 18. Fibrous roots in streambed 2 1 0 19. Rooted upland plants in strearj bed 3 2 1 0 20. Macrobenthos (note dnrersitylan6 abundance) 0 1 2 3 21. Aquatic Mollusks 0 22. °Fish _ 0.5 1 1.5 23. Crayfish LOO 0.5 1 1.5 24. Amphibians 0 0 1 1.5 25. Algae _ 0 0. 1 1.5 26. Wetland plants in streambed FACW = 0.75; OBL = 1.5 Other c= 0 .perennial streamssmay also'be idenofied using -other methods. Seep. 35 of manual. Notes: I Sketch: