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HomeMy WebLinkAbout20170502 Ver 1_401 Application_20170424o C @[M0MC ANR 2 4 20011 April 20, 2017 DLAN �INEERING �y� Ms. Karen Higgins Division of Water Resources, 401 & Buffer Permitting Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Subject: Pre -Construction Notification Trough Branch and UT to Nantahala River Macon County, North Carolina Dear Ms. Higgins: The subject project involves the following: • Stabilization of an unnamed tributary (UT) to the Nantahala River; 20170502 u \, • Retrofits to existing ponds; • Profile adjustments in Trough Branch to address an aquatic organism passage barrier; and • Periodic diversion of a portion of the base flow of Trough Branch to a proposed off-line grist mill. The project is being sponsored by Greg Mullins and Stacy Bredendieck who own the parcel on the east side of Trough Branch (Greg is listed as the landowner on Macon County's land records). Members of the Slagle family own property on the west bank of Slough Branch and have agreed to participate in the proposed work along Trough Branch. Agent Authorization letters from both parties are attached. Project Overview and Proposed Impacts Trough Branch is classified as Class C; ORW and the Nantahala River is classified as B; Tr; ORW. The UT is considered to have the same classification as the Nantahala River. Proposed construction along Trough Branch is limited to approximately 80 linear feet (LF) while the proposed stabilization work on the UT will extend for approximately 350 LF. The enclosed plans show the proposed work. The concept for Trough Branch involves constructing a series of boulder step structures across the bed of the stream. The purpose of these structures is twofold. First, the steps will raise the bed elevation in order to promote aquatic organism passage through the pair of culverts under West Old Murphy Road, which are currently perched more than 3 feet above the downstream bed. Second, the upstream step will create a pool from which water can be diverted through a head gate to an off-line sluice, which will deliver water to a proposed grist mill near the downstream end of the Mullins property. Mr. Mullins has indicated that diversions to the grist mill will be temporary and occasional, on the order to 2 to 4 times per month for no more than 6 hours at a time. At no time will the discharge to the diversion exceed 50% of the normal base flow in Trough Branch. Work on the UT will address bank erosion that is threatening the stability of a driveway culvert and causing a loss of land. Bank erosion is also contributing excess fine sediment to the Nantahala River. Stabilization measures will include in -stream structures, bank grading and planting native woody species on the banks and adjacent floodplain areas. WWildlands Engineering, Inc. (P) 828.774.5547 • 167-B Haywood Road • Asheville, NC 28806 The ponds were constructed decades ago by the previous owners of the Mullins property and are fed by an apparently ephemeral conveyance that originates on the property. The ponds are connected in series by plastic pipes laid across the embankments, two of which have failed and will be removed and replaced with stone spillways. We do not believe that the proposed pond retrofits require agency approval, but we mention this work because it appears on the enclosed plan set. As outlined below, work will be staged in a manner that minimizes disturbance and sediment migration. 1. The disturbance will be a temporary impact and disturbed areas will be stabilized at the end of each day with erosion control matting and straw mulch. The long term benefits include: reducing bank erosion, establishing deep-rooted vegetation along the banks, and promoting aquatic organism passage on Trough Branch by raising the bed profile to match culvert invert elevations. 2. Pump -around flow diversions will be used in both streams to divert flow around the work areas. Excavators will be used to install in -stream structures and grade the stream profiles and banks. Disturbed banks will be seeded, mulched and matted, and live staking will be used to establish deep- rooted vegetation on the banks. 3. A 3 to 4 -week construction period is anticipated. Work efforts will be sequenced to allow for stabilization of completed work at the end of each working day. 4. The primary erosion control practices will include: the pump -around flow diversion, silt fence around staging areas, and seeding, mulching and matting on the disturbed banks. Adjacent floodplain areas will be seeded and mulched, or silt fence or wattles will be installed on the streamside of the disturbance area if the area is to be subject to continued use for access to on-going work. Mulch will be placed on all disturbed areas when rain is anticipated. 5. The designer will be on-site periodically during construction to verify that erosion control measures are being installed and maintained. Erosion control practices will be reviewed prior to anticipated precipitation and shored up as necessary to maximize protection. Equipment fueling and maintenance will be required to occur a minimum of 100 feet from the stream. It has been specified that equipment brought on-site must be in good working order, clean and free of leaks. This submittal includes: • PCN form; (5 >_C S) i • 11" x 17" copy of the 60% plan set; C C7.5 st ) • Signed Agent Authorization Forms; • Sizing calculations for the UT; and • Example photos from the site. d' 1 70 cke� ja,- Pwk V^2ViA- AG This same information has been submitted to the US Army Corps of Engineers, US Fish and Wildlife Service Asheville Office, and North Carolina Wildlife Resources Commission. If you have any questions, please contact me at 828.606.0306 or abick@wildlandseng.com. Sincerely, Andrew Bick, PE Project Manager WWildlands Engineering, Inc. (P) 828.774.5547 • 167-B Haywood Road • Asheville, NC 28806 P � • o�o� wAr�9°c Vj 'P Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Page 1 of 11 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 El Section 10 Permit 1 b. Specify Nationwide Permit (NWP) number: 13 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 1 g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h 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: Rainbow Springs Enhancement 2b. County: Macon 2c. Nearest municipality / town: Franklin 2d. Subdivision name: n/a 2e. NCDOT only, T.I.P. or state project no: 3. Owner Information 3a. Name(s) on Recorded Deed: Gregory L. Mullins 3b. Deed Book and Page No. L-37/1764 3c. Responsible Party (for LLC if applicable): 3d. Street address: 7984 West Old Murphy Road 3e. City, state, zip: Franklin, NC 28734 3f. Telephone no.: 828-369-5280 3g. Fax no.: n/a 3h. Email address: Greg@GENESISTECHNOLOGYUSA.COM Page 1 of 11 PCN Form — Version 1.3 December 10, 2008 Version 4 4. Applicant Information (if different from owner) 4a. Applicant is: ® Agent ❑ Other, specify: 4b. Name: Andrew Bick 4c. Business name (if applicable): Wildlands Engineering, Inc. 4d. Street address: 167-B Haywood Road 4e. City, state, zip: Asheville, NC 28806 4f. Telephone no.: 828-606-0306 4g. Fax no.: n/a 4h. Email address: abick@wildlandseng.com 5. Agent/Consultant Information (if applicable) 5a. Name: Andrew Bick 5b. Business name (if applicable): Wildlands Engineering, Inc. 5c. Street address: 167-B Haywood Road 5d. City, state, zip: Asheville, NC 28806 5e. Telephone no.: 828-606-0306 5f. Fax no.: n/a 5g. Email address: abick@wildlandseng.com Page 2 of 11 PCN Form — Version 1.3 December 10, 2008 Version B. Project Information and Prior Project History 1. Property Identification 1a. Property identification no. (tax PIN or parcel ID): 6542018597 Latitude: 35.098617 Longitude: - 1 b. Site coordinates (in decimal degrees): 83.547386 (DD.DDDDDD) (-DD.DDDDDD) 1 c. Property size: 15.5 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to Trough Branch; Nantahala River proposed project: 2b. Water Quality Classification of nearest receiving water: C, ORW (Trough Br.); B; Tr; ORW (Nantahala) 2c. River basin: Little Tennessee 3. Project Description 3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application: Trough Branch appears to have been straightened decades ago and has become incised such that a roughly 3 -foot high perch exists at a double barrel culvert at the upstream end of the project reach. A UT to the Nantahala River through the property also appears to have been straightended years ago and it too is incised with eroding banks. Land uses in the watershed are primarily forest and cleared pasture, with a small cluster of low density residential upstream of the site. The landowners operate a small farm, with various livestock and fowl. 3b. List the total estimated acreage of all existing wetlands on the property: 0 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 2000 LF 3d. Explain the purpose of the proposed project: The purpose of the project is to stabilize eroding banks on the UT and to raise the bed of Trough Branch in order to improve aquatic organism passage and allow for temporary diversions of a portion of the base flow to a grist mill. Additional activities that do not appear to require regulatory approval include renovation to pond outlet structures and improvement to drainage swales. 3e. Describe the overall project in detail, including the type of equipment to be used: The project will involve sloping banks and installing in -stream rock structures to improve aquatic organism passage, provide grade control and promote formation of a pool from which a portion of the base flow in Trough Branch can be diverted to a grist mill. As indicated on the plans (Sheet 3.3), no more than 50% of the base flow in Trough Branch will be diverted to the grist mill at any time. Diversions will be temporary and occur roughly once per week. The grist mill will serve as a demonstration of traditional mill operations for visitors to the farm. Additional detail is provided in the attached plan set. Graded banks will be seeded with temporary and permanent (native) seed mixes, covered with coir matting and live staked with native woody species. Conventional construction equipment will be used, including a track mounted excavator, dump truck and assorted hand tools. A pump -around flow diversion will be employed for all in -stream construction. Measures will be taken to limit the amount of construction traffic in the streams, but some in -stream equipment access will be necessary to construct the measures. Page 3 of 11 PCN Form — Version 1.3 December 10, 2008 Version 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? Comments: ❑ Yes ❑ No ® Unknown 4b. If the Corps made the jurisdictional determination, what type of determination was made? El Preliminary El Final 4c. If yes, who delineated the jurisdictional areas? Name (if known): Agency/Consultant Company: Other: 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. 5. Project History 5a. Have permits or certifications been requested or obtained for this project (including all prior phases) in the past? ❑ Yes ® No ❑ Unknown 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 4 of 11 PCN Form — Version 1.3 December 10, 2008 Version C. Proposed Impacts Inventory 1. Impacts Summary 1 a. 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 T W1 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W2 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W3 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W4 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W5 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 2h. Comments: 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 Bank Stabilization Trough Branch ® PER ❑ INT ® Corps ® DWQ 15 80 S2 ❑ P ❑ T Bank Stabilization UT Nantahala ❑ PER ❑ INT ❑ Corps ❑ DWQ 6 350 S3 ❑ P ❑ T ❑ PER ❑ INT ❑ Corps ❑ 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 430 3i. Comments: Page 5 of 11 PCN Form — Version 1.3 December 10, 2008 Version 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 T 01 ❑P❑T 02 ❑P❑T 03 ❑P 04 ❑P❑T 4E Total open water impacts 4g. Comments: 5. 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 I I I I 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: 5i. 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. Project is in which protected basin? 6b. 6c. 6d. Buffer impact number— Reason Permanent (P) or for Temoorary (Tl impact 131 ❑P❑T B2 ❑P❑T B3 ❑P❑T 6i. Comments: ❑ Neuse ❑ Tar -Pamlico ❑ Other: ❑ Catawba ❑ Randleman 6e. I 6f. I 6g. Buffer Stream name mitigation required? ❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No 6h. Total buffer impacts Zone 1 impactI Zone 2 impact (square feet) (square feet) Page 6 of 11 PCN Form — Version 1.3 December 10, 2008 Version D. Impact Justification and Mitigation 1. Avoidance and Minimization 1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. The project represents a long-term benefit to the streams and larger Little Tennessee River watershed by stabilizing an eroding banks, enhancing aqautic habitats, and reducing fine sediment inputs. Construction phase best management practices will help minimize the short-term impacts, as described in below. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. The will begin only after all construction materials are stockpiled nearby. Equipment will operate from the top of bank to the extent feasible, but some in -stream equipment access will be necessary to install the restoration measures. A pump -around flow diversion will be employed to dewater work areas. The contract documents will require well-maintained and functioning equipment and daily checks for leaks. An emergency spill plan will also be required. 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State 2a. Does the project require Compensatory Mitigation for 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 project? ❑ Mitigation bank El Payment to in -lieu fee program ❑ Permittee Responsible Mitigation 3. Complete if Using a Mitigation Bank 3a. Name 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 -riparian wetland mitigation requested: acres 4g. Coastal (tidal) wetland mitigation requested: acres 4h. Comments: 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. Page 7 of 11 PCN Form — Version 1.3 December 10, 2008 Version 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? ❑ Yes ® No 6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires 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 riparian buffer restoration, payment into an approved in -lieu fee fund). 6h. Comments: Page 8 of 11 PCN Form — Version 1.3 December 10, 2008 Version E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan 1a. Does the project include or is it adjacent to protected riparian buffers identified ❑ Yes ® No within one of the NC Riparian Buffer Protection Rules? 1 b. If yes, then is a diffuse flow plan included? If no, explain why. ❑ Yes ❑ No Comments: 2. Stormwater Management Plan 2a. What is the overall percent imperviousness of this project? n/a % 2b. Does this project require a Stormwater Management Plan? ❑ Yes ® No 2c. If this project DOES NOT require a Stormwater Management Plan, explain why: Project does not constitute development or an increase in impervious area. 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? n/a ❑ 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 ❑ HQW 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 Plan meet the appropriate requirements? ❑ Yes ❑ No 5b. Have all of the 401 Unit submittal requirements been met? ❑ Yes ❑ No Page 9 of 11 PCN Form — Version 1.3 December 10, 2008 Version F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project involve an expenditure of public (federal/state/local) funds or the ❑ Yes ® No use of public (federal/state) land? 1 b. 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): 3. 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? 3b. 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. 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. Page 10 of 11 PCN Form —Version 1.3 December 10, 2008 Version S. 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? El 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? USFWS review in progress. 6. Essential Fish Habitat (Corps Requirement) 6a. Will this project occur in or near an area designated as essential fish habitat? ❑ Yes ® No 6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat? NOAA Habitat Conservation Mapping Tool 7. Historic or Prehistoric Cultural Resources (Corps Requirement) 7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural 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 archeological resources? NC SHPO GIS service (nearest site is MA 0304, about 1/4 mile east of any disturbance) 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: 8c. What source(s) did you use to make the floodplain determination? ncfloodmaps.com Andrew Bick a,11a '4 41C Applicant/Agent's Printed Name Date Applicant/Agent's Signature (Agent's signature is valid only if an authorization letter from the applicant isprovided.) Page 11 of 11 PCN Form —Version 1.3 December 10, 2008 Version March 21, 2017 Mr. David Brown US Army Corps of Engineers Asheville Regulatory Field Office 151 Patton Avenue, Room 208 Asheville, NC 28801 Subject: NWP Application Agent Authorization Rainbow Springs Stream and Pond Restoration Project Macon County, NC Dear Mr. Brown: I hereby authorize Andrew Bick of Wildlands Engineering, Inc., to serve as my agent and apply on my behalf for a Nationwide Permit for the subject project. If you have any questions, please call me at 828-369-5280. Sincerely, Gregory L. Mullins April 4, 2017 Mr. David Brown US Army Corps of Engineers Asheville Regulatory Field Office 151 Patton Avenue, Room 208 Asheville, NC 28801 Subject: NWP Application Agent Authorization Rainbow Springs Stream and Pond Restoration Project Macon County, NC Dear Mr. Brown: I hereby authorize Andrew Bick of Wildlands Engineering, Inc., to serve as my agent and apply on my behalf for a Nationwide Permit for the subject project. If you have any questions, please call me at 828- 712-1114. Sincerely, C—a` Christine le g 81 UT to Nantahala Abkf = 3.6 sf_ $0 I --�---Existing �Design 79 --� 78 c 77 r 0 76 m LU 75 74 ------- 73 ----- 73 0.00 10.00 20.00 30.00 Station (ft) Discharge Calculation overall reach Q = 1.49/n R2/3 s1/2 A WP (ft) 6.81 est - AlanW- 0.53 design slope 0.08 Channel n Rural est. Rural 24.7 Boundary ShearyRs = 2.64 psf PiedMtn Piedmont est - Rural BKF Area BKF Area Mtn BKF Drainage Areas s. mi. sq (sq Area s Trough Branch 0.52 12.14 13.77 13.77 UT to Nantahala 0.05 2.67 2.92 2.89 Seep channel eastern drainage 0.01 1.01 1 1.08 1 1.06 Discharge Calculation overall reach Q = 1.49/n R2/3 s1/2 A WP (ft) 6.81 R (ft) 0.53 design slope 0.08 Channel n 0.04 Q (cfs) 24.7 Boundary ShearyRs = 2.64 psf largest particle from Shields = 300 mm 11.8 inches Class B stone 5' to 12" for riffles OK Rainbow Springs Enhancement Project Representative Photographs Perched Culverts on Trough Branch Looking Downstream at Trough Branch Bank Erosion on Trough Branch Incised Conditions on UT to Nantahala River Bank Erosion on UT to Nantahala River Detail of Bank Erosion on UT to Nantahala River i e Rainbow Springs Enhancement Macon County, NC for Stacy Bredendieck and Greg Mullins Vicinity Map Not to Scale BEFORE YOU DIG! CALL 1-800-632-4949 N.C. ONE -CALL CENTER IT'S THE LAW! PRELIMINARY PLANS ISSUED APRIL 7, 2017 I Apg242017 Sheet Index Title Sheet 0.1 Project Overview 0.2 General Notes, Symbols, and Typicals 0.3 Stream Plan and Profile 1.1-1.2 Ponds Plan and Profile 2.1 Details 3.1-3.3 Project Directory Engineering: Wildlands Engineering, Inc License No. F-0831 167-B Haywood Road Asheville, NC 28806 Andrew Bick, PE 828-774-5547 Owner: Stacy Bredendieck 7984 West Old Murphy Road Franklin, NC 28734 zunNoo zO V O ry 0 w TZ��v .aZ�QILLE 3W LL A- U Wz � U 0 0 It vir _ r ' GULLY ' STABILIZATION SITE ACCESS AT ENTRANCE GATE START : ^•` STREAM L ENHANCEMENT �'} r •� STA 1+00 a .i GRASSED .` SWALE CONSTRUCTION ji 4 .g 2o r f t. END STREAM +�. { a° t- ; . ENHANCEMENT s. :v ♦ jtq ! n• ® STA 4+50 POND {:. o= s ) �- \... SPILLWAY CONSTRUCTION s+ppf r , u g—of • ,. CLQ- ti � A, - . i� � �`. � x0 t� 1,\ 4 Y -y� art -Y• t x oma "� . # ,. .l�^•��' ,,. , y ��t c '��. M`, Y Y- .' _. ��i` _ �,•�-,yam s., +3. .., �4 t't {(�JJ ,� : \.1r. i *' .4' - - �•• • -r. yt_ ,Z' ry -\'s', '` .�v r _ 0UGy �- Pat ov ry t r�� t� �r rn w. PN 0) tiJ X G g z i mm E c �, - 60' 120' 180' z o V N rn 'ZZ9�Nmo g�nmo z ai=rvo S –oah� a= agLL E 4�4 �54,4J 5�ANW PN 0) tiJ X G g z i mm E c �, - 60' 120' 180' z o V N 4�4 �54,4J 5�ANW PN 0) tiJ X G g z i mm E c �, - 60' 120' 180' z o V N Construction Notes: GENERAL NOTES: 1. CONTACT NORTH CAROLINA "ONE CALL" CENTER (1-800-632-4949) PRIOR TO COMMENCEMENT OF WORK. ALL DAMAGE TO UTILITIES BY CONTRACTOR SHALL BE REPAIRED AT CONTRACTOR'S EXPENSE. 2. CONTRACTOR SHALL STABILIZE DISTURBED AREAS TO PRE -PROJECT CONDITIONS PRIOR TO DE -MOBILIZING. 3. CONTRACTOR SHALL DISPOSE OF EXCESS SOIL, ROCK, GRAVEL AND CLEARED AND GRUBBED MATERIALS ON PROJECT SITE AT A LOCATION DESIGNATED BY THE OWNER OR HAULED AND DISPOSED OF OFF-SITE AT CONTRACTOR'S EXPENSE. 4. CONTRACTOR SHALL BE RESPONSIBLE FOR ANY TRAFFIC CONTROL REQUIRED DURING MOBILIZATION, STAGING, AND ACCESS TO THE RIVER AND LICKLOG CREEK. TRAFFIC CONTROL WILL BE IN ACCORDANCE WITH THE MUTCD AND NCDOT STANDARD DRAWINGS 1101.01 SHEET 3, 1101.02 SHEET 1, AND 1101.04 SHEET 1 AS APPROPRIATE. EROSION CONTROL NOTES: 1. CONTRACTOR SHALL INSTALL AND MAINTAIN EROSION AND SEDIMENT CONTROL DEVICES IN ACCORDANCE WITH LOCAL, STATE AND FEDERAL REQUIREMENTS. ADDITIONAL EROSION AND SEDIMENT CONTROL BASED ON WEATHER CONDITIONS OR ADDITIONAL DISTURBANCE SHALL BE AT CONTRACTOR'S EXPENSE. 2. LOCATE EQUIPMENT AND MATERIALS STAGING LOCATIONS SO AS TO MINIMIZE SITE DISTURBANCE. ENGINEER TO APPROVE ANY STAGING AREAS NOT DEPICTED ON PLANS. 3. INSTALL SILT FENCE ON RIVER SIDE OF ALL SOIL STOCKPILE AREAS OR STAGING AREAS THAT CREATE BARE GROUND CONDITIONS. 4. EQUIPMENT BROUGHT TO PROJECT SITE SHALL BE CLEAN AND FREE OF LEAKS. S. CONTRACTOR SHALL PERFORM FUELING AND MAINTENANCE ACTIVITIES AT LEAST 100 FEET AWAY FROM RIVER AND SHALL MANAGE ALL FLUIDS TO PREVENT LEAKING ONTO GROUND OR TO ALLOW FOR IMMEDIATE CLEAN-UP. 6. RIVER BANK GRADING SHALL BE LIMITED TO AN AREA THAT CAN BE STABILIZED WITH SEED, STRAW AND MATTING BY THE END OF EACH WORK DAY. 7. CONTRACTOR SHALL KEEP ROADWAYS FREE OF ANY DIRT OR DEBRIS THAT COULD BE TRACKED ONTO THEM DURING CONSTRUCTION 6.50' r 1� EXISTING \ 0.80' I �� GRADE L L,,�, PROPOSED 1.50' 2.50— F— 1.50' VARIES GRADE STA 1+00 - STA 2+85 3:1 BANK Riffle Typical SLOPE Scale: 1" = 5' 6.50' EXISTING) GRADE PROPOSED —�^ GRADE =1.60 1.50' VARIES STA 1+00 - STA 2+85 Pool Typical Scale: 1" = 5' Existing Features -- — Existing Stream Centerline ---TB —TB--- Existing Top of Bank ■IMI■I■ Existing Culvert ---3300----- Existing Major Contour (5' Intervals) Existing Minor Contour NOTE: SLOPE DIMENSIONS MAY BE MANIPULATED AS DIRECTED BY ENGINEER TO AVOID TREES ALONG TERRACE Proposed Features 3+00 Proposed Stream Centerline A zZ��aoo z��NmLL `1 — — — — — -- Proposed Terrace Tie-in gu11 Z .iZ U6.64 5: _.... _Pro osed Bankfull (Top of Bank)_...._...._....Q - " emr_x� �Z�ar2E �R Proposed Silt Fence ; y — — — — — — — — Proposed Grassed Swale Proposed Boulder/Rock Step A Proposed Constructed Riffle P� yO0�0� go Proposed Gully Stabilization O� L TIE LEFT BANK INTO EXISTING GRADE EXISTING GRADE STA 3+15 - STA 4+50 Riffle Typical Scale: 1" = 5' TIE LEFT BANK INTO EXISTING GRADE EXISTING GRADE STA 3+15 - 4+50 Pool Typical Scale: 1" = 5' PROPOSED GRADE PROPOSED GRADE 6.50' T I 2.50' RIES [-- 1 1 BANK SLOPE 6.50'I —}-VARIES I-- —_—__--- _--_—_ 6 3335 1( STA =1+00.05, ELEV = 3332.55 3330 3325 m n N + ~ M o M M 11 g 3315 II w w—o � w �4 M Q ~n Ln II 3335 ,• � O In W II p \ F N ri Ln In m O W + M n l0 \ > M \ " T Q LMD M m PROPOSED BANKFULL + ALONG PROPOSED N W to 1\ '� J mm ALIGNMENT v \ t~i1 11 m N lo w v II ` 1 Q J m Lri 3310 � n O I \ + M > g G � ri O = 3+84.39 \ \ h w m N+ = 3307.99 v II 3330 \ m ? ++ PRO POSEDBANKFULLALONGPROPOSEDALIGNMENT H J N W \ M O m ro \ + M 3305 1 \ H W II Q W ELEV = 304.36 \, H cq N \ W N m M o rr STA = 4+34.03 m v N M pn ELEV = 3302.85 ` + m AD M o1pp w M \ •\ \/ In w II u } M N II N W 3325 PROPOSED THALWEG ALONG PROPOSED ALIGNMENT EXISTING GROUND ALONG PROPOSED ALIGNMENT 3320 1 I 3315 4- 1+00 VICONSTRUCT RASSED SWALE Mm EXISTING CULVERT (TYP.) EXISTING CULVERT 3320 EXISTING CULVERT 3315STA = 3 1 M Mry 1 II 11OM1 ry O 1 Q J m mp N 1 W } mw g-1 M H+M O�1 II M 1 Q W It V�1 WF J M l\ `\ /A\ EXISTING GROUND 1� ALONG PROPOSED ALIGNMENT 3310 �� ELEV = 3311.5 PROPOSED THALWEG ALONG PROPOSED ALIGNMENT 3305 0' 20' 40' 60' 0' 2' 4' 6' (NORQOMAL) IVEpIKgLI 3320 m 3315 II w M Q ~n Ln II W II p n W 00O M \ > M Q vii w m M m PROPOSED BANKFULL + ALONG PROPOSED 1\ '� J mm ALIGNMENT v \ of w v II ` 1 Q J m Lri 3310 � n O I \ + M > AD1 N G � ri O = 3+84.39 M = 3307.99 v II H J N W . ro \ 3305 STA = +20.46 ELEV = 304.36 \, STA = 4+34.03 ELEV = 3302.85 ` —iI I 11 3315 3300 1 1 I I 1+50 2+00 2+50 3+00 3+20 2+80 3+00 3+50 4+00 NO LEFT BANK / BENCHING OR 3a� / GRADING STA 1+35 .3 TO 1+55 TO i NO LEFT BANK BENCHING OR GRADING �O STA 3+15 TO 4+50 TO PRESERVE TREES. PRESERVE TREES 3 1`, TIE IN TO EXISTING BANK AT TYPICAL BANKFULL i' PROTECT SEPTIC DRAIN ^ #. FIELD, OFFSET iS' FROM LEFT TOP OF BANK _ // o - ROCK STEP (TYP.)04 ` m PROTECT i ATURE / POPLAR Ir CONSTRUCTED RIFF (TYP.) TYP) I i BIN WORK _ STA 1+00 - _ -. F : v '! 1 x EXISTING RCP TO BE PLUGGED M -+ �` h/ ♦ ��_ i �. ��? ..-_ 5}00 WITH CONCRETE AT BOTH ENDS/ l '•.., ,3''�� -� - MEND - i •wc'`r,. ��. WORK / r _ - I / �' ♦ � -- _ STA 4+50 MODIFY BENCH AND TERRACE SLOPE ' \ POND " f' DIMENSIONS AS NECESSARY TO \ PRESERVE TREES Pd� r - i F 3300 4+50 4+75 0' 20' 40' 60' Ixox¢oxrul zo,2124 Za�ulm W O V V m 0 a gZnmy q = Wp Z m � .1 3325 EXISTING 60" _ CULVERTS 3320 BOULDER STEPS (TYP.) - 3315 3310 1+00 as .+ e•l m n m ry �wf �m ¢ u mm + .r � J '••I M a u v II M I" a n vai v, -- yl W ,••I M --- w u m ¢ II o Zs n m \ � W PROPOSED THALWEG \ \ 1 ALONG ALIGNMENT t—_ EXISTING GROUND \ ALONG ALIGNMENT 1+50 2+00 2+50 3+00 3+50 4+00 4+50 3325 A m 1D zo-�o4 We,•, 6 0a 2 -OO U 4Z �Q9LLE 3W LL 3320 3315 3310 5+8904 0' 20' 40' 60' EXISTING FENCE TO / \F� �a L �; •. r �� d BE MOVED ASNEEDED# / . ; 'fit �"► ` ' TO AVOID SLUICE AND 40 / MILL BUILDING OHEAD GATE 4 a\ •�' WOODEN SLUICE '' ON PIERS .� 1 . 0.i r tivow BOULDER STEPS FOR FISH PASSAGE AND POOL CREATION MILL BUILDING AND WHEEL TAIL RACE SEE SHEET 3.3� FOR DETAILS ft, 4 \',�¢ *�, .1► ��'�• z EWmm 0' 70' 40' 60' a `u a SPILLWAY INVERT: i o z a 6' 3330.9' rvcx Knu I zo' ao' fio' SPILLWAY INVERT: o' ' IxonaoM�y \ I 3326.6' BERM BETWEEN , 3330 PONDS (TYP.) \ I 3330 \I \ I , SPILLWAY INVERT: I \I / 3326.9 r , I i=_- 1 \w \ � I 3325 \ 3 I SPILLWAY INVERT: 3325 \ 3320.1' / BED OF SPILLWAY (TYP.) 1 \ \ I \ I \ 1 \1 I\I i EXTEND SPILLWAY SO THAT IT -- �— -----� I 3320 ENDS BELOW EXISTING WATER 3320 / ELEVATION � I EXISTING GROUND ALONG DRAIN PIPE INVERT: ALIGNMENT ` II 3315.3' L I �I SPILLWAY INVERT: ` I / 3315.4 I I I SPILLWAY INVERT: 3315 �— \ 3313.3' 3315 EXISTING WATER \ ELEVATION AT SURVEY \ 3312 - — — 3312 1+00 1+50 2+00 2+50 3+00 3+50 p7- yF' VVV EXISTING PIPE TO BE REMOVED GRAVEL DRIVEWAY ADD CLASS I INLET E + - ` o _ - AND -SW BANK OF POND k EXISTING 12" RCP TO BE - y w y tipx REMOVED OR PLUGGED AT g� d BOTH ENDS POND 1 EXISTING PIPE TO + 1 REMAIN /'1R }� E t ,_ POND 2 �AfPIID • r 4 CONSTRUCTSPILLWAY i + SEE DETAIL 3, SHEET 3.1 (TYP ALL PONDS) ` r ° + EXISTING PIPE TO BE REMOVED' I � z All CONSTRUCTSPILLWAY. r "+f'+_ i �` I .. .. i �.e i � i ter t 0' 20' 40' 60' CONSTRUCT SPILLWAY EXISTING PIPE TO REMAIN EXISTING PIPE TO BE REMOVEDAll 't \ 1 PROTECT EXISTING POWER .I POLE - ' 2 t "millNall i+ A 9 '" pyn D°0 zZ_ °CC„OOutm4 9ry �nm 4W2ZnmN 1-1 Sd pp Z �FLL i 4� �P 44w�°5w4o�• co s 1 FLOW ELEVATION POINT VARIES BY STEP ARRANGEMENT BACKFILL IS MIX OF STON SEE PROFILE FOR ELEVATION STONE, CLASS A AND NATIVE GRAVIRAVI MATERIALS, MUST I COMPACT, VOIDS MUST I FILLED WITH MATERIJ HORSESHOE B ARCHED ANGLED THALWEG ON UPSTREAM 1/3 OF ANGLED STEP HEADER AND FOOTER ROCKS BACKFILL DEPTH Types of Step TO BOTTOM OF Configurations FOOTER FOR NONWOVEN MINIMUM OF 3' FILTER FABRIC TYPE MAY BE VARIED BY DESIGNER UPSTREAM HEADER BOULDER IN FIELD- INTENDED TYPE IS FOOTER BOULDER GENERALLY REFLECTED BY PLANS. RIFFLE OR OTHER DETAILS TO RIGHT REFLECT HORSE -7 "'PER ORSE/PER PLAN Section View (Section A -A') POOL SHOE OR ARCHED AND SHALL BE ADAPTED FOR OTHER TYPES. Plan View UPPERPOND _UPPERINVERT LOWER POND Plan View TOP OF SPILLWAY TOP OF BERM UPPER "\,, UPPER POND TOP OF BERM — — — — BASE WATER ELEVATION NER INVERT �— VARIES TOP OF BERM 2 (TYP) 1 r :, 12" THICK CLASS A STONE OIT— RIVER COBBLE (6' MEDIAN SIZE) NON -WOVEN 2 FILTER FABRIC Section View (Section A -A') — — — --BASE WATER ELEVATION 'BOTTOM OF- LOWER INVERT a EXTEND BELOW BASE WATER ELEVATION Profile View n Pond Spillway \,L'J Not to Scale CLASS 1 STONE PLACED IN LOWEST POINT NOTE: CLASS 1 ROCK 15 REQUIRED FOR HEADERS AND FOOTERS, IF 2x2xl BOULDERS ARE USED, NO FOOTER IS REQUIRED I� PROTECT EXISTING VEG. AT TOP OF BANK Section View (Section A -A') 1' LAYER #57 HEAD OF RIFFLE ELEVATIO POINT PER PROFIL RIFFLE VENEER Profile A -A' Profile View n Gully Stabilization 3.1 Not to Scale SEE PROFILE Plan View LB 18" DEPTH CLASS B STONE MIX WITH ONSITE COBBLE/GRAVEL AND SAND TO FILL VOIDS. MIX SHOULD CONSIST OF NO MORE THAN 20% GRAVEL AND SAND. Constructed Riffle 3.1 Not to Scale )F RIFFLE ELEVATION f PER PROFILE Section &B' INVERT PER PROFILE --TOP OF BANK (TYP) RIGHT AND LEFT EDGE OF CHANNEL 0.1-0.2' HIGHER THAN INVERT SCARIFY SUBGRADE, REMOVE ROCKS EROSION CONTROL AND DEBRIS, SEED WITH TALL MATTING (NAG OL BN OR FESCUE AND APPLY STRAW MULCH E IVALNT BEFORE INSTALLING MATTING APPROVED EQUIVALENT) 6' 3 (TYP) 1� OP OF BANK (TYP) NOTE: 1. INSTALL CLASS A STONE CHECK DAMS AT 50' TO 80' INTERVALS, WITH CLOSER SPACING FOR STEEPER SECTIONS. Section 5 Grassed Swale 3.1 Not to Scale 6" CLASS A STONE CHECK DAM, SEE NOTE Tn A9 p n m m zZ�"Znm4 a01 uJ W0 Z =gig i—mnw r�Z ^myQ�LLE ►q m �, 3 C'A 44w�o�w¢�b` GO NOTES: NONWOVEN 1. WHERE STRUCTURE ARMS ON PIANS ARE FILTER FABRIC SHOWN LONGER THAN SYMBOL, CONTRACTOR MUST EXTEND STRUCTURE (ROCK AND FABRIC) FURTHER INTO BANK (GENERALLY INTO OR Profile View FIRMLY ABUTTING SOLID GROUND, AS DIRECTED) 2. WHERE WITHIN 9" VERTICALLY OF ORIGINAL CHANNEL INVERT, ROCK MUST TIE INTO Boulder/Rock Ste ORIGINAL INVERT AND MINIMUM HEIGHT \Z-1/Not to Scale SHALL BE ADJUSTED ACCORDINGLY. BOWL OUT PER TYPICAL POOL CONTINUE SECTION, AS SHOWN BOULDERS AND ON PROFILE, OR AS FABRIC T MIN. DIRECTED INTO BANK BOTTOM WIDTH (TYPICAL SECTIONS) (HEADERSAND FOOTERS), V BOTH SIDES UPPERPOND _UPPERINVERT LOWER POND Plan View TOP OF SPILLWAY TOP OF BERM UPPER "\,, UPPER POND TOP OF BERM — — — — BASE WATER ELEVATION NER INVERT �— VARIES TOP OF BERM 2 (TYP) 1 r :, 12" THICK CLASS A STONE OIT— RIVER COBBLE (6' MEDIAN SIZE) NON -WOVEN 2 FILTER FABRIC Section View (Section A -A') — — — --BASE WATER ELEVATION 'BOTTOM OF- LOWER INVERT a EXTEND BELOW BASE WATER ELEVATION Profile View n Pond Spillway \,L'J Not to Scale CLASS 1 STONE PLACED IN LOWEST POINT NOTE: CLASS 1 ROCK 15 REQUIRED FOR HEADERS AND FOOTERS, IF 2x2xl BOULDERS ARE USED, NO FOOTER IS REQUIRED I� PROTECT EXISTING VEG. AT TOP OF BANK Section View (Section A -A') 1' LAYER #57 HEAD OF RIFFLE ELEVATIO POINT PER PROFIL RIFFLE VENEER Profile A -A' Profile View n Gully Stabilization 3.1 Not to Scale SEE PROFILE Plan View LB 18" DEPTH CLASS B STONE MIX WITH ONSITE COBBLE/GRAVEL AND SAND TO FILL VOIDS. MIX SHOULD CONSIST OF NO MORE THAN 20% GRAVEL AND SAND. Constructed Riffle 3.1 Not to Scale )F RIFFLE ELEVATION f PER PROFILE Section &B' INVERT PER PROFILE --TOP OF BANK (TYP) RIGHT AND LEFT EDGE OF CHANNEL 0.1-0.2' HIGHER THAN INVERT SCARIFY SUBGRADE, REMOVE ROCKS EROSION CONTROL AND DEBRIS, SEED WITH TALL MATTING (NAG OL BN OR FESCUE AND APPLY STRAW MULCH E IVALNT BEFORE INSTALLING MATTING APPROVED EQUIVALENT) 6' 3 (TYP) 1� OP OF BANK (TYP) NOTE: 1. INSTALL CLASS A STONE CHECK DAMS AT 50' TO 80' INTERVALS, WITH CLOSER SPACING FOR STEEPER SECTIONS. Section 5 Grassed Swale 3.1 Not to Scale 6" CLASS A STONE CHECK DAM, SEE NOTE Tn A9 p n m m zZ�"Znm4 a01 uJ W0 Z =gig i—mnw r�Z ^myQ�LLE ►q m �, 3 C'A 44w�o�w¢�b` GO NONWOVEN POSITION OF POOL SHALL FILTER FABRIC BE PER DETAIL OR AS DIRECTED WHEN INAPPARENT CONFLICT WITH PROFILE Profile View STONE PROTECTION REQUIRED WHEN FILL IS EXPOSED BELOW FOOTER Boulder/Rock Ste \Z-1/Not to Scale UPPERPOND _UPPERINVERT LOWER POND Plan View TOP OF SPILLWAY TOP OF BERM UPPER "\,, UPPER POND TOP OF BERM — — — — BASE WATER ELEVATION NER INVERT �— VARIES TOP OF BERM 2 (TYP) 1 r :, 12" THICK CLASS A STONE OIT— RIVER COBBLE (6' MEDIAN SIZE) NON -WOVEN 2 FILTER FABRIC Section View (Section A -A') — — — --BASE WATER ELEVATION 'BOTTOM OF- LOWER INVERT a EXTEND BELOW BASE WATER ELEVATION Profile View n Pond Spillway \,L'J Not to Scale CLASS 1 STONE PLACED IN LOWEST POINT NOTE: CLASS 1 ROCK 15 REQUIRED FOR HEADERS AND FOOTERS, IF 2x2xl BOULDERS ARE USED, NO FOOTER IS REQUIRED I� PROTECT EXISTING VEG. AT TOP OF BANK Section View (Section A -A') 1' LAYER #57 HEAD OF RIFFLE ELEVATIO POINT PER PROFIL RIFFLE VENEER Profile A -A' Profile View n Gully Stabilization 3.1 Not to Scale SEE PROFILE Plan View LB 18" DEPTH CLASS B STONE MIX WITH ONSITE COBBLE/GRAVEL AND SAND TO FILL VOIDS. MIX SHOULD CONSIST OF NO MORE THAN 20% GRAVEL AND SAND. Constructed Riffle 3.1 Not to Scale )F RIFFLE ELEVATION f PER PROFILE Section &B' INVERT PER PROFILE --TOP OF BANK (TYP) RIGHT AND LEFT EDGE OF CHANNEL 0.1-0.2' HIGHER THAN INVERT SCARIFY SUBGRADE, REMOVE ROCKS EROSION CONTROL AND DEBRIS, SEED WITH TALL MATTING (NAG OL BN OR FESCUE AND APPLY STRAW MULCH E IVALNT BEFORE INSTALLING MATTING APPROVED EQUIVALENT) 6' 3 (TYP) 1� OP OF BANK (TYP) NOTE: 1. INSTALL CLASS A STONE CHECK DAMS AT 50' TO 80' INTERVALS, WITH CLOSER SPACING FOR STEEPER SECTIONS. Section 5 Grassed Swale 3.1 Not to Scale 6" CLASS A STONE CHECK DAM, SEE NOTE Tn A9 p n m m zZ�"Znm4 a01 uJ W0 Z =gig i—mnw r�Z ^myQ�LLE ►q m �, 3 C'A 44w�o�w¢�b` GO 1 e D FILTER FABRIC COMPACTED FILL �i. EXTEND FABRIC _/-H 4 INTO TRENCH NOTES: 1. USE WIRE A MINIUM OF 32" IN WIDTH AND WITH A MINIMUM OF 6 LINES OF WIRES WITH 12" STAY SPACING. 2. USE FILTER FABRIC A MINIMUM OF 36" IN WIDTH AND FASTEN ADEQUATELY TO THE WIRES AS DIRECTED BY THE ENGINEER. 3. PROVIDE 5' STEEL POST OF THE SELF -FASTENER ANGLE STEEL TYPE. ANGLE STEEL TYPE. Temporary Silt Fence Q- 3,2/ Not ro Scale 6" MIN. OVERLAP IN DOWNSTREAM DIRECTION AT MAT ENDS STAKE (TYPK ( I TOP OF BANK FILTER FABRIC A SpgC/� A A A G A A A A A A A SANDBAG TOE OF SLOPE (24" X 12" X 6") OR STONE. Plan View EROSION CONTROL MATTING (700g/sm COI R) �T�c nF BANK EXISTING GROUND e/L/�a�/��' " ECOSTAKE(TYP) OF s o 8' MAX. WITH WIRE w 4 N (6' MAX. WITHOUT WIRE) N MIDDLE AND c TOP AND VERTICAL WIRES BOTTOM SHALL BE 12 } STRAN GAGE MIN. SHALL BE 10 _TN 0.6" TOE STAKE GAUGE MIN. 20 Eco Stake U U WIRE So9tantrten mfrs FILTER FABRIC COMPACTED FILL �i. EXTEND FABRIC _/-H 4 INTO TRENCH NOTES: 1. USE WIRE A MINIUM OF 32" IN WIDTH AND WITH A MINIMUM OF 6 LINES OF WIRES WITH 12" STAY SPACING. 2. USE FILTER FABRIC A MINIMUM OF 36" IN WIDTH AND FASTEN ADEQUATELY TO THE WIRES AS DIRECTED BY THE ENGINEER. 3. PROVIDE 5' STEEL POST OF THE SELF -FASTENER ANGLE STEEL TYPE. ANGLE STEEL TYPE. Temporary Silt Fence Q- 3,2/ Not ro Scale 6" MIN. OVERLAP IN DOWNSTREAM DIRECTION AT MAT ENDS STAKE (TYPK ( I TOP OF BANK FILTER FABRIC A SpgC/� A A A G A A A A A A A SANDBAG TOE OF SLOPE (24" X 12" X 6") OR STONE. Plan View EROSION CONTROL MATTING (700g/sm COI R) �T�c nF BANK EXISTING GROUND e/L/�a�/��' " ECOSTAKE(TYP) OF s o Section View w 4 N TOE STAKE (TYP N ECOSTAKE (TYP 'j 4 r Sky Wikrn \ 1.25" N'suhork T_ F o Eldwbe ry Ll Strtaxthm _TN 0.6" TOE STAKE Sip Swnnwm 20 Eco Stake - nr-- dr - n Erosion Control Matting So9tantrten mfrs 3.2 Not to Scale NOTE: 1. LIVE STAKES TO BE PLANTED IN AREAS AS SHOWN ON TYPICALS AND DIRECTED BY THE ENGINEER. 2. 3x3' AVG SPACING (2 STAGGERED ROWS AT TOP OF BANK, AS SHOWN IN PLAN VIEW OF DETAIL) 3. LIVE STAKING SHOULD BE COMPLETED DURING THE DORMANT SEASON, GENERALLY DECEMBER TO APRIL LIVE STAKE (TYP) \ (- I 3' Max (Typ) TOP OF BANK TOE OF SLOPE Lin "kes Sdantse NNW Ammon Noma Comm amamun Sky Dagrood Salk serica Sky Wikrn Phyawrgs opuNdiur N'suhork Somi txxn caredorsis Eldwbe ry CephlaMhtn ocoidertalis Strtaxthm Section View 0 YO LIVE STAKETYP ?q„ F BANK \y p cc -36 1/2" 1/2" TO 2" > A DIAMETER a w O� H D. iry ¢ Live Stake Detail Plan View TOE OF SLOPE Live Staking_ k.L2j Not to Scale HIGH STRENGTH DOUBLE STITCHED gH' WN IN SPOUT NOTE: "J" TYPE SEAMS. BAG PLACED ON,,,,,,,1. PROVIDE STABILIZED OUTLET to AGGREGATED ORGH STRENGTH TO STREAMBED. Q ^ RAPPING DEWATERING BAG STRAW. EXISTING TERRAIN o o �,o R HOLDING HOSE x --o °p 4 o DEWATERING PLACE. m 9 �� WZhm d BAG ;;t<ar,C•� •t :iv:} + �: ^ }a..�^.: �q. STREAM BED Z x w gn R WATER FLOW STABILIZED OUTLET Q 0 m 5 u FROM PUMP2 USING CLASS B ►a Z a LL E 15' .•i w s 'of CLASS B RIPRAP RIPRAP TRENCHED INTO FLEXIBLE EXISTING DISCHARGE HOSE FILTER FABRIC GROUND A MINIMUM IMPERVIOUS SHEETING Inset "A" SIZE 1S'to 20' LOCATION TO BE ` Dewatering Bag DETERMINED IN THE FLOW 10' MIN HEIGHTVARIES(2' MIN) MAINTAIN V MIN. OF/FORINTAKEHOSE. DIG SUMP 1' DEEP FREEBOARD WHILE PUMPING. �APPROX.� DISCHARGE HOSE 3' Inset "B" Impervious Dike PUMP INTAKE HOSE` IMPERVIOUS DIKE (SEE INSET "B") INTAKE ACTIVE WORK AREA - Plan View 3 Pum Around System 3.2 Not to Scale sQRiparian Seeding 3.2 Not to Scale FIELD BY THE ENGINEER. "don Sid IMix ING CLASS B RIPRAP AND 3"M Sant, Dahaasd Stiller rd LWW Amar 2 FILTER FABRIC. PUMPEE CDISCHARGE See ft Rab: M Olncw Saw Mulch 1,000 Spseia Name Common Noma Prow"M PaNctrn chwK onion Dar Tatpn 20 Ardmpq)on grantii Sip Swnnwm 20 Flyrm+tkpnicus VIr"*11" 20 So9tantrten mfrs tdirpraw 20 CAamanOwm la"urn Rtw CiW 10 anon sinus SaR Rush 10 sQRiparian Seeding 3.2 Not to Scale FIELD BY THE ENGINEER. 1• ING CLASS B RIPRAP AND ERINGDOTTYPE 2 FILTER FABRIC. PUMPEE CDISCHARGE INSET "C") Saw Mulch 1,000 FILTER FABRIC FLEXIBLE DISCHARGE HOSE &VMtop Mllot 10 FROM PUMP AROUND PUMP HELD IN PLACE 20.1010 FoUlzr TSD EWATERING BAG LO WITH SAND BAGS AS Inset"C" NEEDED. Ground Apiataaol Umsstone x,ow IMPERVIOUS DIKE (SEE INSET "B' ) 'X 5'STABILIZED OUTLET 1• ING CLASS B RIPRAP AND ERINGDOTTYPE 2 FILTER FABRIC. PUMPEE CDISCHARGE INSET "C") Saw Mulch 1,000 SILT FENCE &VMtop Mllot 10 (SEE DETAILS/3.2) 20.1010 FoUlzr TSD EWATERING BAG HOSE (SEE INSET "A") SEEDING: 1. SEEDBED WILL BE AMENDED WITH TOPSOIL OR LIME ON AN AS NEEDED BASIS 2. SEEDBED SHALL BE LOOSE AND FREE OF ROCKS AND DEBRIS PRIOR TO SEEDING AND MULCHING 3. TEMPORARY AND PERMANENT SEED SHOULD BE APPLIED TOGETHER IF PLANTING DATES ALLOW. MULCHING: 1. 2 TONS PER ACRE 2. GRAIN STRAW PREFERRED, ALTERNATIVES SUCH AS LEAVES WILL BE CONSIDERED UPON REQUEST Twnpwory wNog On OWASpy Arnandmals b Sbam Ike" 1• Two FLrMrrgIYt. fbhaal Jon 1 -May ti Rya Grain 120 d Gmtm Aacul uLim.waa ZODD 20.10.10 Fsditw TW Saw Mulch 1,000 May 15 -Aug 15 &VMtop Mllot 10 Ground AWbAural Limestone 2,000 20.1010 FoUlzr TSD Straw Haan 1,000 >s - Die 30 Rya Grain 120 Ground Apiataaol Umsstone x,ow 2010.10 Ferdizer 1,00D Straw Mulch 1,000 ©Temporary Seeding and Mulching OlNot to Scale r,