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HomeMy WebLinkAbout20110286 Ver 2_401 Application_20131113lk- oagcoY2- T.E. ALLEN ENGINEERING, P.C. Post Office Box 103 Rosman, North Carolina 28772 Phone (828) 8774883 Firm # C -1997 Mobile (828) 553 -3004 October 8, 2013 SUBJECT: Safee Residence, Stream Restoration and Sediment Removal, 2748 West Club Blvd., Lake Toxaway, Transylvania County, NC NC DWQ, 401/Wetlands Unit 1650 Mail Service Center Raleigh, NC 27699 -1650 Dear DWQ: Enclosed, please find five (5) copies of the 401/404 application (PCN form). A check for the application review fee is also enclosed. This project is for a stream restoration and sediment removal at an unnamed tributary to Lake Toxaway, Transylvania County, North Carolina. Lake Toxaway as B; Tr. The total length of proposed stream restoration is approximately 240 linear feet. See attached Sketches SK -1 thru SK -5. By copv Lthis letter, a trout buffer variance is hereby requested from the NCDENR — Division of Land Resources QXgMlicable). The buffer disturbance will exceed ten percent of the stream frontage. All disturbed areas not to be filled or flooded will be vegetated pursuant to the seeding schedule in the Erosion and Sediment Control Planning and Design Manual. If you have any questions or require any additional information, please do not hesitate to contact me at (828) 877 -4883 or email tealleneng&a,citcom.net. Enclosures Sincerely, f WL Te �E.Allen, P.E. Consulting Engineer 5 copies of 401/404 PCN Application Form Check for application review fee Q NOV 1 2 2013 Copy Furnish w/ attachment: 401 PERMITTING Mr. Kevin Barnett NCDENR Division of Water Quality 2090 US Hwy 70 Swannanoa, NC 28778 828 - 296 -4500 NC FISH & WILDLIFE PERMITTING NC Wildlife Res. Commission Old Fish Hatchery Attn: Mr. Dave McHenry 20830 Great Smoky Mtn. Expressway Waynesville, NC 28786 USACE 404 PERMITTING Mr. Steve Kichefski Asheville Regulatory Field Office US Army Corps of Engineers 151 Patton Ave, Room 208 Asheville, NC 28801 -5006 TROUT BUFFER VARIANCE Mr. Gray Hauser, Jr., PE Division of Land Resources Land Quality Section 1612 Mail Service Center Raleigh, NC 27699 -1612 1 copy of 401/404 PCN Application Form and Sketches SK -1 thru SK -5 1 copy of 401/404 PCN Application Form and Sketches SK -1 thru SK -5 1 copy of 401/404 PCN Application Form and Sketches SK -1 thru SK -5 1 copy of 401/404 PCN Application Form and Sketches SK -1 thru SK -5 J i A `O�ot WA TF191 O < I -0a$ LO v a-. Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre - Construction Notification C Form A. AppHcant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: ®Section 404 Permit El Section 10 kemtit 1 b. Specify Nationwide Permit (NWP) number: 27 - Stream Restoration, 13 & 18 or General Permit (GP) number: 1c. Has the NWP or GP number been verified by the Corps? ® Yes ❑ No 1d. 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 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: STREAM RESTORATION and SEDIMENT REMOVAL 2b. County: Transylvania 2c. Nearest municipality / town: Brevard 2d. Subdivision name: Lake Toxaway 2e. NCDOT only, T.I.P. or state project no: 3. Owner Information 3a. Name(s) on Recorded Deed: Edward F. Safee and wife, Natalie Safee 3b. Deed Book and Page No. Book 634, Page 676 - 681 3c. Responsible Party (for LLC if applicable): 3d. Street address: 2748 West Club Blvd. (Lot No. 122 of Block BB of Lake Toxaway Co.) 3e. City, state, zip: Lake Toxaway, NC 28747 3f. Telephone no.: 727 -423 -7088 3g. Fax no.: fia ' 3h. Email address: I I E-_—�L NOUY22013 v W A t/t Page 1 of 11 Fes' 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: S. AgentlConsultant Information (if applicable) 5a. Name: 5b. Business name (if applicable): 5c. Street address: 5d. City, state, zip: 5e. Telephone no.: 5f. Fax no.: 5g. Email address: 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): 1b. Site coordinates (in decimal degrees): Latitude: 35.130678 Longitude: - 82.95382 (DD.DDDDDD) (- DD.DDDDDD) 1c. Property size: 1.52 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to Lake Toxaway proposed project: 2b. Water Quality Classification of nearest receiving water: B, Trout 2c. River basin: Savannah 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: This parcel is wooded and undeveloped and is located in Toxaway Estates, a private residential development in western Transylvania County, NC. The lot has several un -named tributaries and drain directly into Lake Toxaway which has a classification of B: Trout. The general land use is residential. 3b. List the total estimated acreage of all existing wetlands on the property: none 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: none 3d. Explain the purpose of the proposed project: Remove accumulated sediment in streams, stabilize banks, install grade control boulder weirs to create step pools to trap future sediment and improve water quality. The site and streams receive runoff directly from the Toxaway Golf Course. 3e. Describe the overall project in detail, including the type of equipment to be used: Remove approximately 50 cubic yards of sediment, construct approximately 240 linear feet of boulder stream bank stabilization. Install 115 lienar feet for boulder weirs for grade control & step pools. See attached Sketches SK1 thru SK5. The overall length of the proposed stream bank stabilization shall not exceed 240 linear feet. Stabilization structure to be natural granite boulders, class 2 dprap gradation. The structure for the grade control weirs shall also be natural granite boulders. Where it is necessary to create a dry work area, all dewatering discharge shall have a turbidity of not more than 10 NTUs above background or as otherwise specified in DWQ's Turbidity Standards (15A NCAC 02B.0211(3.)(k.)). To satisfy the required turbidity limit, the dewatering pump discharge shall be filtered through a Bag Filtration Unit equal to Model BF400 from Rain - for -Rent with a 100 to 1 micron nominal rating (P.O.C. at Rain - for -Rent is Jeremy at 704 -393- 3345). The turbidity level of all discharge shall be monitored with calibrated turbidity meters and the filtration equipment shall be adjusted as necessary to insure compliance with Water Quality Standards. Downstream water shall likewise be monitored with calibrated turbidity meters to insure compliance with Water Quality Standards. Uncured concrete shall not be allowed to come into direct contact with surface waters. This will be accomplished by establishing a "dry work area" as described above. "High Early" cementious material shall be in the stone work to minimize curing time. 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? ❑ preliminary ❑ 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 W1 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W2 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W3 ❑ P [IT ❑ Yes ❑ Corps ❑ No ❑ DWQ W4 ❑ P [IT ❑ Yes ❑ Corps ❑ No ❑ DWQ W5 ❑ P ❑ T ❑ Yes ❑ Corps ❑ No ❑ DWQ W6 ❑ P ❑ T ❑ Yes ❑ No ❑ Corps ❑ 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 Stream Bank Stabalization Un -named Tributary to Lake ® PER ❑ INT ® Corps ® DWQ 15 240 Toxaway S2 ❑ P ®T Grade Control Weirs Un -named Tributary to Lake PER E3 INT ®Corps ®DWQ 15 115 Toxaway S3 ❑ P [IT ❑ PER ❑ INT ❑ Corps ❑ DWQ S4 ❑ P [IT ❑ PER ❑ Corps ❑ INT ❑ DWQ S5 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ S6 ❑ P ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h. Total stream and tributary impacts 355 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 01 ❑ P ® T Lake Toxaway Lake 02 ❑P ❑T 03 ❑P ❑T 04 ❑P ❑T 4E Total open water impacts 0 4g. Comments: Dredging work will be accomplished "in the wet" while the lake level is at normal pool elevation. Dredging with small excavator with minimual incidental fall back. Turbidity curtains will be used to isolate the work areas and curtains will remain in place until the turbidity in the work area is less than 10 NTUs above background. Upland disposal site with have no return water and no wetlands will be impacted. Seawall work will be accomplished "in the dry" by installing a temporary coffer dam around the proposed work area. The dewatering discharge will be filtered to DWQ Water Quality Standards prior to release. 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 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: Page 6 of 11 PCN Form — Version 1.3 December 10, 2008 Version 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 El Tar-Pamlico El Other: Project is in which protected basin? ❑ 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 ❑Yes ❑ No 6h. Total buffer impacts 6i. Comments: D. Impact Justification and Mitigation 1. Avoidance and Minimization 1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. Only low impact construction methods were specified. A dry work area will be created. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. To minimize disturbance during construction, the work will be accomplished with the smallest mechanical equipment practicable. Work will be accomplished "in the dry" by installing a temporary coffer dam around the proposed work area. The dewatering discharge will be filtered to DWQ Water Quality Standards prior to release. 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State 2a. Does the project require Compensatory Mitigation for ❑ Yes ® No impacts to Waters of the U.S. or Waters of the State? 2b. If yes, mitigation is required by (check all that apply): ❑ DWQ ❑ Corps ❑ Mitigation bank 2c. If yes, which mitigation option will be used for this El Payment to in -lieu fee program project? ❑ Permittee Responsible Mitigation 3. Complete if Using a Mitigation Bank 3a. Name of Mitigation Bank: 3b. Credits Purchased (attach receipt and letter) Type Quantity Page 7 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? % 2b. Does this project require a Stormwater Management Plan? ❑ Yes ® No 2c. If this project DOES NOT require a Stormwater Management Plan, explain why: 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? ❑ 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 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: 6. 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? ❑ 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: Should project exceed 10% or 100' in 1000', a trout buffer waiver will be sought from NCDENR - Div of Land Resources Page 8 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 /stateAocal) 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)? 1c. 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. N.A. Page 10 of 11 PCN Form —Version 1.3 December 10, 2008 Version 6, endangered Species and Designated CrWeat Habitat (COM iRaqutrement) 5a. Will thlo project occur' in or near an arm with federally protected spades or ❑ Yes ®No habitat? 5b Have you chooued with the USPwS conceming Endangered Species Act 0 Yes ® No impact? _ ❑ Raleigh Raleig(!e 5c. if yes, indreate the USFWS FIWd Office you hoe contacted, p 5d, What data sources old you use to detervnN wttathar your site would Impact EndariWad Species or Designated CfWcai i tabitat? 8. EnaniJal Fhrh Habttat (Corps PApImmentj 6a. Will this prajvd occur In or near an ergo designated an easenW fish hebhe? ❑ Yes 1 No 8b. What date sources did you use to deterndnr whether your milts would lmpact ftwtlf Fish t-tapitr117 7. Historic or Prehistoric Cultural Resources (Corp Requirement) 7a. Wim this p *ed occur in or now an area thS the ate, federal or Mal governments have designated as having FirstWO or CtlttUMI pre wmation Yes No status (e,g., Notional Historic ThW designation or pru penles al riftent in North Carolina history and archa*01M)? 7b. What data swices did you uae to detemtine whctner your site would Irroact hlooft or archeological rrasources7 fl. Flood zone Designation (Corps RequiremenQ 80. WIN mnis project occur In a FEMA detlgnoted loo-yaw floodplaln? [1 Yes ❑ No 8b. it yes, soaln how prgoo P%M FEMA requirements: Sc. What source(p) did you use to make ms floodPlaln lion? Edward F. Safiee ���� / /0— Natalie Safee J 4'�``-t-- e, Applicant/Agen 819natum Data Applrcant/Aganre printed Name (Agwta eipnot r* is vell0 miy M A aw4 tzo" wmr from the aPPacw t Is wirilded.) Page 11 Of 11 PCN Form w Vettiw 1.3 December 10, 2008 Version STREAM RESTORATION & SEDIMENT REMOVAL PLAN SAFEE REmDENCE9 LAKE Il OX/nIWLz111 y INC SCOPE —OF —WORK This work shall include removing accumulated sediment along two (2) parallel stream sections; construction of 240 Linear Feet of natural granite boulder bank stabilization; and installing two (2) grade control weirs and step pools as shown. The sediment removal work is to be performed "in— the —wet" while the streams are at a low flow condition. Special turbidity control measures are required to insure compliance with NCDENR Water Quality Standards. Remove sediment shall be performed by bucket and shovel or mechanized equipment (where allowable by permit). A turbidity threshold of 10 NTUs above background shall not be exceeded. Install natural boulder grade control weirs as shown. GENERAL NOTES. 1.0 The Contractor shall obtain all required permits prior to beginning work. This work may require a "Certificate of Approval" from the NCDENR Division of Land Resources, Land Quality Section; US Army Corps of Engineers Section 404 wetlands permit; and NCDENR Division of Water Quality Section 401 Water Quality Permit, Sedimentation & Erosion Control Permit, and other permits deemed necessary by authorities having jurisdiction over the projects. 2.0 All work shall be in accordance with the latest edition of the North Carolina State Building Code, NCDENR Division of Land Quality & Division of Water Quality Requirements, OSHA Safety and Health Requirements, ACI 301 — Specifications for Structural Concrete, ACI 318 — Building Code Requirements for Structural Concrete, NC Sedimentation Pollution Control Act, and all other applicable codes, ordinances, and regulations. 3.0 The Contractor shall locate, flag, and protect all existing utilities prior to beginning work. Verify all dimensions and elevations prior to beginning work or ordering materials. Land disturbing activities shall not exceed 1 acre. 4.0 The Contractor's construction activities shall be performed by methods that will prevent entrance, or accidental spillage, of solid matter, contaminants, debris, or other pollutants and wastes into streams, flowing or dry watercourses, lakes or underground water sources. PRELIMINARY NOT FOR CONSTRUCTION 5.0 EARTHWORK. Satisfactory materials shall be placed in 6" compacted lifts. Material shall be compacted to 95% of the maximum dry density. Classification of backfill materials shall be determined in accordance with ASTM D 2487 and the moisture— density relations of soils shall be determined in accordance with ASTM D 698. A minimum of one soil classification and one moisture — density relation test shall be performed on each different type of material used for bedding and backfill. Field in —place density shall be determined in accordance with ASTM D 698. 6.0 Ground cover shall be established on exposed slopes within 10 calendar days following completion of any phase of grading and permanent ground cover shall be established on all disturbed areas within 14 calendar days following completion of each respective phase of construction. 7.0 The Contractor shall furnish and install all required erosion control features prior to beginning work. All erosion control measures shall be inspected and maintained on a routine basis. All Silt Fence, stone check dams, ditches, culverts and sediment traps shall be maintained. Any accumulated sediments shall be removed as needed. 8.0 All monitoring and inspections shall also be in accordance with conditions of the Sedimentation & Erosion Control Permit; Construction Stormwater Permit NCG010000, 401 certification, and stream standards. 9.0 By accepting this plan, you and any others to whom it is distributed, agree to a strict limitation of liability for Terry E. Allen PE, T.E. ALLEN ENGINEERING, P.C., and its employees to an amount not to exceed the fee paid in hand. 10.0 ASBUILT RECORD DRAWINGS. The Contractor shall maintain a full size set of the approved plans on site at all times. The Contractor shall annotate the plans using red ink to reflect all changes, adjustments and modifications. The exact location and elevations of all major features —of —work shall be recorded. Two (2) sets of these annotated marked —up drawings, along with two (2) sets of the downstream monitoring documentation, shall be delivered to the Engineer at the completion of work. The Contractor shall also provide an asbuilt topographic survey of the work area to be included with the As —Built Drawings. a ci v z 00 N N �Z Zo Waco °x MO U CL lei CD CX W 'a oE3 e� LJ C.5 t. ` .g >z W EE J J a LJ Z _O F Q cu U 0 � U) V) W4) �U U Q4- ca W� 0 vz V 00 � UW o c co �3 N p O U W� ca .a NM NM SKI SHEET 1 OF 5 r CIS 0 X O a� co W SEED SPECIFICATIONS FOR THE 25 —FOOT BUFFER ZONE: c 1. Planting and Seeding in the 25 —foot buffer zone adjacent to trout waters shall be in accordance with the document entitled "Guidelines for Riparian Buffer Restoration ", N.C. Department of Environment and Natural Resources, Ecosystem Enhancement Program, October 2004. 2. Grasses and woody vegetaton in the buffer shall be native plant specs. For lawn areas, the blend of native varieties shall be Kentucky Bluegrass (Poa pratensis L. ssp. pratensis) and (Festuca rubra L. ssp. rubra). APPLICATION RATES Red Fescue 52 Lb /Acre Kentucky Bluegrass 13 Lb /Acre 3. All work shall be carried out by an approved spraying machine specially used for this work. The Contractor shall submit to the Landscape Architect for approval (prior to start of work) a certified statement as to number of pounds of fertilizer,amounts and types of grass seed, and processed fiber, per 100 gallons of water. 4. Soil Amendments. Follow recommendations of soil tests or apply 4,000 lb/acre ground agricultural limestone and 1,000 lb /acre 5 -10 -10 fertilizer. 5. Mulch. Apply 4,000 — 5000 lb /acre grain straw. Anchor mulch by tacking with asphalt, roving, or netting. Netting is the preferred anchoring method on steep slopes. 6. Maintenance. Do not mow crown vetch. Refertilize in the second year unless growth is fully adequate. Reseed, fertilize, and mulch damaged areas immediately. 7. Control of Grosses and Forbs. In the early stages of riparian buffer establishment, competition for nutrients by adjacent grasses and forbs will substantially inhibit seedling growth. Release from herbaceous competition has been demonstrated as the most cost — effective method to accelerate the growth of seedlings. The plan for buffer establishment shall incorporate control of the herbaceous layer. Options for weed control include four to six inches of well —aged hardwood mulch, weed control fabrics, or pre— emergent herbicide. Typically, mowing to control weeds will be impractical based on the random distribution of plantings. Weed control should be continued for three years from the time of planting. PRELIMINARY NOT FOR CONSTRUCTION 8. Areas of Concentrated Flow. During the establishment 3 a period, the riparian buffer should be inspected for evidence ? co of concentrated flow. If concentrated flow has begun to form, ?c, a level spreader or other best management practice should z0Z� be installed to diffuse the flow before it enters the restored °O�o ;o riparian buffer. El m o x� N X 12 . 2.0 DOWNSTREAM MONITORING (per DWQ) 2.1 Before work begins the receiving stream shall be a"N &0J°' U a monitoring locations. DWQ will review this information to evaluated by the Contractor. Depending on the downstream Z reach at least 3 locations shall be established for monitoring. M V Z Initial cross sections are to be performed. Photo W W documentation of these locations shall also be provided. z €8S r- -"4 W A 2.2 Downstream waters shall be monitored eriodicall P Y W O > co (minimum of weekly) while work is being performed. The z (A En withdrawal or repair work should be discontinued if J 8 downstream waters are turbid or if sediment is released. If -C o sediment is released or turbid waters persists contact DWQ 0Cg0 11 4- � F" within twenty four hours for guidance. If sediment loss W Q tj impacts the receiving stream then sediment removal will be co sandbags at the lake /pond headwaters and siphoning around required under DWQ approval. 2.3 Once work is completed another cross section and photo documentation shall be performed at the set Z monitoring locations. DWQ will review this information to 0 N confirm stream impacts have not occurred. "'" (~ V Z U 2.4 Sediment must be prevented from reaching surface Q u M Co n z waters during the lake /pond drawdown. The withdrawal r- -"4 W A fixture should be placed at or near the surface with floats b O > co 3 (and water level reduced by no more than one vertical foot (A En M 3 X per day, in accordance with Dam Safety Guidelines). nj X o 2.5. While work is being performed at the dam, the 0Cg0 11 4- � F" ' 0 lake /pond should be isolated from moving water (i.e., via Q tj o V co sandbags at the lake /pond headwaters and siphoning around L4 0 -a the lake, or other means necessary to perform work "in the dry"). However, flow to the receiving waters should not be (/] removed or reduced to a level detrimental to aquatic life. 2.6 After the impoundment is drained, install sediment and scow erosion control structures and /or hydroseeding as be am necessary to stabilize exposed soil and sediment (or other —HREOR soak method of stabilization). "°"` bm odw as -n -m+a 2.7. Prior to beginning work the Owner shall attempt to remove fish from the pond to lessen the impact of the SK2 drawdown on the aquatic life. SHEET 2OF5 EXISTING STREAM BED LOCATION \ LARGE WOOD STRUCTURE KEYS, STREAM RESTORATION &SEDIMENT R�EMOV�LpIPLAN W/ TRUNK BURIED INTO BANK. \ OOL #1 any others to whom it is distributed, agree TYPICAL Approximate Vol = 0.2 Acre -Ft to a strict limitation of liability for Terry E. Approximate Surface Area = 2,700 SF Allen PE, T.E. ALLEN ENGINEERING, P.C., and PP its employees to an amount not to exceed the fee paid in hand. BANK STABILIZATION MATH NATURAL GRANITE RIPRAP, SIZE•- �:=,'" =` r GRADATION MEETING NCDOT CLASS ��f # 2 RIPRAP. 240 LF TOTAL ti. " ": = : =• -'``•`' ,�• I POOL 2 ':= OVERALL LENGTH OF RIPRAP BANK' Approximate Vol = 0.2 Acre -Ft STABILIZATION. i .' Approximate Surface Area 2,829 SF �� LOT NO. 122, BLOCK BB LIN , • 1.52 ACRES +/ POOL #3 4*3 ��� - �S '/ i`. • /��/ �i f-� r' Approximate Vol = 0.1 Acre -Ft �C, Approximate Surface Area = 1,360 SF GRADE CONTROL WEIR /`q/ ` (� I • �/` • �� #1, 65 LF. NATURAL GRANITE BOULDERS 'fc �� \� �� �� �! / . • /� �' i \ WITH AVERAGE SIZE �D 18' X24' X48" i \ �, 20'X20' GAZABO EXISTING CULVERT I �/ `. �i •�;Y }' Y II 1`\\ �`\ \�`� ��� ` 'ol UNDER ROAD S (DESIGNED BY OTHERS) �N - -- t j- " i'J \_ • ��� \\ y \ TO LAKE TOXAWAY . I �'` ��� {� _� ` �• '��\ \ CULVERT OUTLET INVERT 3015.1 FT, FROM RAXTER SURVEY �bl / TO LAKE TOXAWAY _ rt / J • / • • EXISTING CULVERT UNDER ROAD (DESIGNED BY OTHERS) / • "' `�- ` \`�`^ \�� �� CULVERT INLET INVERT 3015.3 FT, FROM RAXTER SURVEY �`. - ,��•�- - -� ��\ `� BANK STABILIZATION MATH NATURAL GRANITE RIPRAP, SIZE GRADATION MEETING NCDOT CLASS 2 RIPRAP. 240 LF TOTAL OVERALL LENGTH OF RIPRAP BANK STABILIZATION. GRADE CONTROL WEIR 02, 50 LF. NATURAL GRANITE BOULDERS MATH AVERAGE SIZE 18 "X24' X48" LARGE WOOD STRUCTURE KEYS, W/ TRUNK BURIED INTO BANK. TYPICAL TIMBER CART BRIDGE ACROSS POOL. ALIGNMENT OF CART PATH AND BRIDGE SHALL BE FIELD ADJUSTED TO ACHIEVE THE BEST FIT. ,r j -'\ STREAM RESTORATION & SEDIMENT REMOVAL PLAN Not to Scale EXISTING STREAM ` _ Y BED LOCATION 50-FT STANDARD .-� \• t' �� T �� SETBACK FOR SEPTIC SYSTEM I I (• �� [.1950(a)] J v =`\\ \� \ `. \ NOTE 2. All survey data, 0 topography, etc., was provided by Roger Roxter, PLS. These drawings shall not be considered an official land survey and shall not be relied upon for survey Information. See Official Land prepared by Roger Raxter, PLS. NOT FOR d U � Z Co N z ZO �v c;c W.0 x(0 0 %xrN x r° U CL a ag W LJ ac, W• �o E LLI W f- 0 Cd U Z O W v W as Cd a 3 x � 4) Xj 0 d� a� _S4 as U) Nat NOW SK3 SHEET 3 OF 5 c top bp° (structure keys) PLAN 8" THICK BINTONTE CLAY BLANKET ACROSS UPSTREAM SLOPE OF GRAVE CONTROL WEIR SPECIAL NOTE. Some portions of this work may occur beyond or outside the property line and within the private road right —of —way or on adjacent Property Owners land. The Owner/ Contractor shall obtain all required authorizations, easements, rights —of —way and rights —of —entry prior to beginning work beyond the subject property boundaries. All property boundaries shall be located and marked by a NC Registered Professional Land Surveyor prior to beginning work. See Sheets R -1 and R -2 for additional requirements. large wJ0d (structure keys) channel width (CW) ordinary high water- SECTION channel bottom PROFILE 1 GRADE CONTROL WEIR SK4 Not to Scale PRELIMINARY NOT FOR CONSTRUCTION 0 "large wood -ft (structure keys) I n U � z co N H ?U N M rQ �_ �� 0 U CL CM z ix a og W LJL—'� Z Ho LLJ J W H Z o ¢�U z 00 U as P. bo (��C1Cis X O a)N0F" Q� 0�.s � l .e«�m swK wa dw. oaak oe- Trims SK4 SHEET 4OF5 C Accumulation of sedimentation in stream bed removed by hand means (bucket and shovel) No wheeled or mechanized equipment shall be Average Stream Width is approx 15 —FT shall be only. used. - PRE — REMOVAL CROSS SECTION (SEDIMENT TO BE REMOVED BY HAND) (HAND WORK ONLY) 1 SEDIMENT REMOVAL from STREAMBED SK5 Not to Scale PRELIMINARY NOT FOR CONSTRUCTION NOTES 1. No work shall be undertaken within streams or buffers between October 15th and April 15th or as otherwise specified by the NCDENR or NC Fish & Wildlife. 2. Stream bed and streambank to be stabilized after sediment removal. 3. Should the impacted area extend of property, the Contractor shall obtain "Right —of— Entry" from adjacent Property Owner prior to beginning work. 4. The type and density of reestablished vegetation shall match adjacent undisturbed areas. Restore Downstream Impacted areas. Reestablish indigenous aquatic zone, bank zone and shrub zone vegetation. Reestablished vegetation in the shrub zone shall be by "cutting between riprap ". The type and density of reestablished vegetation shall match adjacent undisturbed areas. d U � Z N F2 go 1n M Z d2 Zo �` 1r V C 3 way a xx 0X00 !% - 12 - U CL _ W c—Za dR €3S � E I W J J a � � Z O +� �¢Uz 00 U cli Fboc3 wW m 3 x C\l 0 dV) o� .� a� .a CO V) NO[ wbonm scow Now bow oms 08-27 -2013 SK5 SHEET 5 OF 5