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Home My WebLink About20030258 Ver 1_Articles_20030306WAT O 9 Michael F. Easley, Governor Willi R G J S QG oss r., am . ecretary North Carolina Department of Environment and Natural Resources - Alan W. Klimek, P.E. Director _ .i Division of Water Quality March 12, 2003 Mitchell County DWQ Project No. 030258 SR 1317 (Renfro Road) APPROVAL of 401 Water Quality Certification with Additional Conditions Mr. Roger D. Bryan, Division Environmental Officer NCDOT Division 13 P.O. Box 3279 Asheville, NC 28802 Dear Mr. Bryan: You have our approval, in accordance with the attached conditions and those listed below, to impact 130 linear feet of Miller Branch in order to upgrade SR 1374 (Renfro Road) in Mitchell County. The project should be constructed in accordance with your application dated February 28, 2003 (received March 6, 2003), including the environmental commitments made in the application letter. After reviewing your application, we have decided that this fill is covered by General Water Quality Certification No. 3375 corresponding to the U.S. Army Corps of Engineers Nationwide Permit Number 14. In addition, you should acquire any other federal, state or-local permits before you proceed with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. This approval will expire with the accompanying 404 permit unless otherwise specified in the Water Quality Certification. This approval is only valid for the purpose and design that you described in your application except as modified below. If you change your project, you must notify us, in writing, and send us a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed one acre or stream impacts exceed 150 linear feet, compensatory mitigation may be required as described in 15A NCAC 21-1.0506 (h) (6) and (7). For this approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed below. 1. NCDOT shall abide by any conditions or moratoriums as determined by the NC Wildlife Resources Commission to protect aquatic species and their habitat. 2. NCDOT shall implement Best Management. Practices for the Protection of Surface Waters (NCDOT March 1997). 3. Stormwater should be directed to vegetated buffer areas, grass-lined ditches or retention basins and must not be routed directly into streams. Mowing of existing vegetated buffers is strongly discouraged, so that they may be utilized for storm water sheet flow. 4. Riparian vegetation must be reestablished within the construction limits of the project by the end of the growing season following completion of construction. 5. The culverts shall be designed and installed to allow for fish and other wildlife movement as well as prevent headcutting of the streams. 6. NCDOT must submit a plan for written DWQ approval to address any headcutting that will occur as a result of this project. 7. Use of rip-rap for bank stabilization is to be minimized; rather, native vegetation is to be planted when practical. If rip-rap is necessary, it must be limited to the stream bank below the high water North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) 919-733-1786 (phone), 919-733-6893 (fax), hftp://h2o.enr.state.nc.us/ncwetiands/ mark, and vegetation must be used for stabilization above high water. Rip rap shall not be placed in the stream bottom. 8. Upon completion of the project, the NCDOT shall complete and return the enclosed "Certificate of Completion" form to notify NCDWQ when all work included in the §401 Certification has been completed. The responsible party shall complete the attached form and return it to the 401/Wetlands Unit of the NC Division of Water Quality upon completion of the project. Please include photographs upstream and downstream of each structure to document correct installation. If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition that conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Ms. Cynthia Van Der Wiele at 919.733.5715 or Mr. Mike Parker of the Asheville Regional Office at 828.251.6208. Sincerely, Attachment Pc: Wilmington District Corps of Engineers Steve Lund, USACE Asheville Field Office Mike Parker, NCDWQ Asheville Regional Office Central Files File Copy ^` Klimek, P.E. r ? 030258 401 ISSUED STATE of NORTH CAROLINA DEPARTMENT OF TRANSPORTATION MICHAEL F. EASLEY LYNDO TIPPETT GOVERNOR SECRETARY PO BOX 3279, ASHEVILLE, NC 28802 February 28, 2003 Mr. Steve Lund WETLANDS/ 401 GROUP US Army Corps of Engineers MAR 11 2003 151 Patton Avenue, Room 208 Asheville, NC 28801-5006 FILE COPY WATER QUALITY SECTION Subject: Nationwide Permit #14 SR 1317, Renfro Road State Project No. 6.882059T (DWQ Minor Permit Fee $200) Mitchell County, NC Dear Mr. Lund: I have enclosed a straight-line diagram with erosion control plan, a PCN application for NWP #14, and a vicinity map relative to the proposed project on SR 1317, Renfro Road, Mitchell County, NC. Renfro Road is currently a 12-14 feet wide gravel road. Division of Highways plans to pave the road 18 feet wide and increase the typical section. Grading will be moderate to heavy. We propose to extend five existing culverts on Miller Branch. Total culvert extensions will be 130 linear feet. Existing channel morphology will be maintained upstream and downstream of the culverts. The culverts will be placed below existing streambed elevation. Riparian vegetation will be reestablished along disturbed areas associated with the culvert extension. Stormwater will be diverted through grass-lined ditches or vegetated buffers prior to entering streams. No significant effect on federally listed species (threatened or endangered) or their habitats is anticipated. By copy of this letter, we request Ron Linville, North Carolina Wildlife Resources Commission Coordinator, to comment directly to the Corps concerning the permit request. r; Mr. Steve Lund Page -2 SR 1317, Mitchell County February 28, 2003 By copy of this letter, we are asking Ed Ingle, Area Roadside Field Operations Engineer, to comment on the above project. Temporary encroachment into the buffer zone of the Miller Branch will be required for the entire project. The stream is classified as trout. A buffer variance will be required. By copy of this letter, I am forwarding seven (7) copies of the application package to Cynthia Van der Wiele, NC DENR, Division of Water Quality, 401/Wetland Unit for review and comment. Please charge the application processing fee of $200.00 to work order # 6.882059T. Please forward comments directly to the Corps with copy to Division 13 Environmental Officer. Your earliest consideration for this request would be greatly appreciated. If you have any questions or information needs, please contact me at (828) 251-6287. Sincerely, P, Ro D. Bryan g Division 13 Environmental Officer Enclosures cc: J. J. Swain, Jr., P.E. G. R. Spangler L. R. Watkins, P.E. Ed Ingle Ron Linville Cynthia Van der Wiele Office Use Only• pForm Version April 2001 USACE Action • ID No. DWQ No. 0302 5 9 If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. 1. Processing Check all of the approval(s) requested for this project: X Section 404 Permit ? Section 10 Permit X 401 Water Quality Certification ? Riparian or Watershed Buffer Rules 2. Nationwide, Regional or General Permit Number(s) Requested: NWP 14 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII - Mitigation), check here: ? II. Applicant Information 1. Owner/Applicant Information Name: NC Department of Transportation Mailing Address. P.O. Box 3279 Asheville NC-28802 Telephone Number: 828-251-6287 Fax Number: 828-251-6394 E-mail Address: rdbryanaa dot state nc us 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Company Affiliation: Mailing Address: Telephone Number: E-mail Address: Fax Number: Page 1 of 8 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: SR 1317 Renfro Road 2. T.I.P. or State Project Number (NCDOT Only): 6.882059T 3. Property Identification Number (Tax PIN): 4. Location County: Mitchell Nearest Town: Tipton Hill Subdivision name (include phase/lot number): Directions to site (include road numbers, landmarks, etc.): SR 1317 is located off of NC 197 and SR 1316 approximately 3 miles Northeast of the North Toe River. 5. Site coordinates, if available (UTM or Lat/Long): 36 03'33"N 82 16'33"W (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or- condition of the site at the time of this application: Existing secondga road 7. Property size (acres): 2. 8. Nearest body of water (stream/river/sound/ocean/lake): Miller Branch 9. River Basin: French Broad (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http//h2o.enr.state.nc.us/admin/nigps/.) Page 2 of 8 10. Describe the purpose of the proposed work: We propose to guade, drain, base, pave and install erosion control measures for SR 1317(Renfro Road). We propose to extend five existing culverts on Miller Branch. Total culvert extension will be 130 linear feet. The culverts will be installed to insure aquatic life passage within the streams. 11. List the type of equipment to be used to construct the project: Excavator, backhoe, and trucks. 12. Describe the land use in the vicinity of this project: Rural, homes and wooded. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. N/A V. Future Project Plans Are any additional permit requests anticipated for this project in the future? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application: No no future plans. VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Wetland Impacts Wetland Impact Type of Impact* Area of Located within Distance to Page 3 of 8 Site Number Impact 100-year Floodplain** Nearest Stream Type of Wetland*** (indicate on mat)) (acres) (yes/no) (linear feet) N/A * t ;qt each imnnrt genarntely and identify temnorarv impacts. Impacts include, but are not limited to: mechanized excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at http:/hvww.feina.gov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: 0.0 Total area of wetland impact proposed: 0.0 2. Stream Impacts, including all intermittent and perennial streams Stream Impact Site Number (indicate on ma Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? (please seci ) Sta. 5+50 Culvert 30 Miller Branch 2 ft P Sta. 11+00 Culvert 30 Miller Branch 2 ft P Sta. 24+00 Culvert 20 Miller Branch 2 ft P Sta. 26+25 Culvert 30 Miller Branch 2 ft P Sta. 31+10 Culvert 20 Miller Branch 2 ft P * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at www.usgs.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.toi)ozone.com, www.mapguest.coin, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 130 feet. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Type of Impact* Area of Name of Waterbod Type of Waterbody __j Page 4 of 8 Site Number Impact (if applicable) (lake, pond, estuary, sound, (indicate on ma) (acres) bay, ocean, etc.) N/A * List each impact separately and identity temporary impacts. Impacts include, but are not limited to: till, excavation, dredging, flooding, drainage, bulkheads, etc. 4. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The existing secondary road must be improved to meet current safety standards for a paved road The culvert extensions requested are the minimum necessary to establish an appropriate typical section for the roadway that will be stable and prevent future erosion. Riparian vegetation will be established on disturbed areas associated with the project construction. VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. Page 5 of 8 USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/'ncwetlands//strms,,,ide.htm]. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. N/A 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that you would like to pay into the NCWRP. Please note that payment into the NCWRP must be reviewed and approved before it can be used to satisfy mitigation requirements. Applicants will be notified early in the review process by the 401/Wetlands Unit if payment into the NCWRP is available as an option. For additional information regarding the application process for the NCWRP, check the NCWRP website at http:A.,'li2o.enr.state.nc.aslwm/index.htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): Amount of buffer mitigation requested (square feet): Amount of Riparian wetland mitigation requested (acres): Amount of Non-riparian wetland mitigation requested (acres): Amount of Coastal wetland mitigation requested (acres): IX. Environmental Documentation (DWQ Only) Page 6 of 8 Does the project involve an expenditure of public funds or the use of public (federal/state/local) land? Yes X No ? If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No X If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only) It is the applicant's (or agent's) responsibility to determine; delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259,r (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ? No X If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required Mitigation 1 3 2 1.5 Total * Zone 1 extends out 30 feet perpendicular from near bank of channel; Lone z extenos an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0260. Page 7 of 8 XI. Stormwater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. The existing compacted gravel roadway acts as an impervious surface. Paving of the roadway should eliminate sedimentation from fines associated with gravel surface treatment. The roadway surface will be 40% of right of way surface area. No additional impervious surface will be added Stormwater will diverted through settling basins or grass lined buffers prior to entering the streams XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ? No X Is this an after-the-fact permit application? Yes ? No X XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). With regard to hazardous spill basins the road is not classified as an arterial route, therefore hazardous spill basins are not required 2/2F Appliont/Agent's ??gnature mate (Agent's signature is valid only if an authorization letter from the applicant is provided. Page 8 of 8 ? o ? >1 cn v x x o a d' w u 3 w x O A 3 W -O z ? Z -------- - w - -- ----- --- ----- -- -- a x w x ? 0 U O U u a .a M M Z cn fti. w Q w a 0 A h ? ? O ? w pU ?I v w z 3 (? A N Quadrangle, Scale 1:24000). Vicinity Map: SR 1317, Renfro Road, Mitchell County, NC (Huntdale 1 SHEET 1 OF 16 COUNTY: Mitchell TOWNSHIP: Bradshaw PROJECT: SR 1317, Miller Branch Renfro Road LENGTH: 3,469 feet, 0.66 miles WORK TYPE: grade, drain, base, pave, erosion control RURAL PRIORITY #: 26 LOCATION: From SR. 1317, thence for 0.66 miles SUBD/RESID. PRIORITY M R/W WORK ORDER NO: 6.882059T CONSTRUCTION W. O. NO. DATE: 6/5/01 SCALE: 1"=50' DRAWN BY: KEP NOTES AND PROVISIONS PERTAINING TO STRAIGHT LINE DIAGRAM 1. Assigned right of way agent needs to verify all property owners. Property owners shown on the straight line diagram are taken from tax maps only. 2. Fences to be moved off the right of way and reset off right of way by the Department of Transportation crews. Any new materials, posts, wire, etc.. to be supplied by the property owner. 3. Existing asphalt or concrete drives to be tied in with asphalt if the existing driveway is within 20 feet of proposed centerline. See any exceptions on straight line diagram. 4. Driveway pipes to be furnished and installed as needed by Department of Transportation crews in existing driveways. 5. Existing water lines, sewer lines, drain lines, etc., under road project to be adjusted by Department of Transportation as needed during construction. Property owners to supply all materials and release Department of Transportation from any liability. 6. Underground utility lines to be located by owner. Lines to be adjusted by owner as needed, otherwise retain. 7. Note proposed right of way markers shown on straight line diagram. 8. Please inform property owners that cuts and fills could exceed proposed right of way. 9. The erosion plan should be used for erosion control purposes only. (??5? 0iU CQr.? C ?- 1 u +`i ? t* +1 E-, 'S 11 11 16 SR 1317, MILLER BRANCH RENFRO R0. SHEET2-OF. l 1 MITCHELL COUNTY TYPICAL SECTION 45' R/W E A. FILL SLOPE 116:1 ABC COMPACTED B. SHOULDER SLOPE 1' PER FT. ABC LOOSE C. DITCH SLOPE 3 :1 ! TONS (DRIVES) STONE BY D. CUT SLOPE 16:1 TONS (INTERS.) ` TONS (ROAD) TONS (TOTAL) I 3' I SHEET 3 OF 16 FULL 1 SUPERELEVATION ULL SUPERELEVATION SECTION - EE 2/3 SUPERELEVATION 2/3 SUPERELEVATION P. C. OR P. T. SECTION - DD SUPERELEVATION = NORMAL CROWN NORMAL CROWN SECTION - CC LEVEL NORMAL CROWN SECTION - BB NORMAL CROW NORMAL CROWN SECTION - AA STANDARD METHOD FOR OBTAINING SUPERELEVATION 2 LANE PAVEMENTS Ideally. 2/3 of superelevation is obtained at P. C. or P. T. as shown on Section - DD Example: if maximum superelevation is +.06 -.06, the superelevation at the point of curve or point of tangent is +.04 -.04 .06 X 2/3 =.04 Superelevation for 18' Pavement .02 0.4' E.P. to E.P. .04 0.7' E.P. to E.P. .06 1.1' E.P. to E.P. .08 1.4' E.P. to E.P. Normal Crown - 0.2 Sheet 4,of 16 EROSION CONTROL PLAN SHEET Generally, the order of installation of the erosion control measures will be as follows: Temporary silt basins shall be installed before clearing and grubbing begins. Silt fences and temporary silt ditches shall be installed after clearing and before grading. Temporary stone ditch checks shall be installed as soon as ditch line is established. Pipe outlet and inlet protection will be done as soon as the pipe is installed. Seeding and other permanent erosion control measures are to be implemented as soon as practical. Temporary rock silt checks (type B) will be spaced as required by percent of grade as described on page VI-16 in the Erosion And Sedimentation Guidelines. No. 5 stone, or equivalent, will be used in conjunction with temporary rock silt check Type-B in locations where water is leaving the project or entering a pipe. Silt basin size is 9'x3'x2' for 75 feet of disturbed ditch line unless otherwise noted. Silt basin (Type B) are designed for 1200 cubic feet per acre every storm event and cleaned out when half full. Per permit conditions for Corps of Engineers and the Wildlife Resources Commission, all pipes in streams must be buried 12" below streambed elevation. Sheet 5 of 16 PIPE INSTALLATION NOTES 1) Install erosion control devices. In streams, where necessary, rock silt screen will be used. 2) Remove material and existing pipe while limiting, as much as possible, material and sediment from entering the stream and/or escaping from project. 3) Prepare pipe foundation while again taking care to limit, as much as possible material and sediment from entering the stream and/or escaping from project. Where possible, new grade will be below existing streambed. If needed, bedding material will be clean stone. 4) Place the new pipe and compact backfill. 5) Install slope protection on outlet and inlet ends of pipe. Also complete installation of erosion control measures and perform maintenance as needed on existing measures. 6) Establish permanent vegetation as soon as possible. ` SHEET 6 OF 1 DESIGN FOR SILT BASIN 1200 CUBIC FEET PER ACRE CH'ECKEO EVERY STORM 'EVENT AND CLEANED OUT WHEN HALF FULL NOT TO SCALE 3\? /41:?- 9, 2' SILT BASIN - 1 /(S.B.7 ) >-- 2' LENGTH OF DISTURBED AREA 75' r SILT BASIN - 2 (S. B.14 ) 2' >- c? SILT BASIN - 3 (S. B. 21 ) 6 2' y- LENGTH OF DISTURBED AREA 200' LENGTH OF DISTURBED AREA 300' SILT BASIN - 4 .1 LENGTH OF DISTURBED AREA 400' ( S. B. 28 ) SHEET 7 OF `16 EROSION CONTROL DETAILS AND SPECIFICATIONS Std_ # Description Symbol 245.03 Temporary Silt Ditch -TSO - 245.05 Temporary Diversion TO -• - 893.01 Temporary Silt Fence Hi H- 890.05 Temporary Slope Drain with Earth Berm '- 245 01 Silt Basin T e A . yp 245.02 Silt Basin Type B - 892.04 Temporary Rock Silt Check Type - A 895 10 Tem orar Rock Silt Check T e - B ? . p y yp ?- 892.01 Temporary Rock Sediment Dam Type - A - 892.02 Temporary Rock Sediment Dam Type - B -:D 897 01 Rock Pi e Inlet Protection U0. - . p 894.01 Rock Silt Screen 245 04 Stillin Basin . g Rock Inlet Protection 000000 0 896.01 Type A 0 A 0008 - OR - A 96 02 T B 000000 000000 0 F-1 00 B 0"o - OR B . ype 896.03 Type C 000000 000000 C 0008 - OR - C 000000 SHEET 8, OF 16 ROCK SILT CHECKS - OUTLET OF PIPE 1 (WIDTH OF ROCK AT THE OUTLET END TO BE 3 TIMES THE DIAMETER OF THE PIPE AND TAPERED INTO EXISTING DITCH) M5 . 18' CSP RR 18 M6N. -------------------------- T? EXISTING DITCH ------------- ' MIN- 24' CSP RR 24 M EXISTING DITCH 7.5' 30' CSP RR 30 M9N. EXISTING DITCH 9 36' CSP RR 36 MAN. i --------------------------- EXISTING DITCH 10.5' 42' CSP RR 42 L MIN. ------------------------- - EXISTING DITCH 12 ------------------------- f 48' CSP 1 RR 48 _ ISlP /3/ 7 .?!/FiPO PD . --- -_ - - SHE 9 3¢ E.VD:P?POP_.,:/B.?.P,/K/1T, • . 12 25 .22.5 ROYCE.?11,9NC Y. A1144ER 4 n 8K, 1331 P6,153' N -- y GREEN M041AIrAI.V, NC 287¢0 N- 688-.4558 NNA .?f1/? fB? W p? BK; /58i P6.2 10 END Deck 19211 MY 6104 VE, _ ... _ ... l ' ?? MM141, R 330,56 - - n /-------------._.. ?- -- T/B 5 e- --_... _.- ----...._... --- -- ------ --.._ . _....._ _ BEG . ' 3lP'?CSP R. A9 PH, -76 /p Q • 1- - _ __ . -. _ ___?,__ .. _ ,f 9 T B£O;P.POP•78-'!2/K/LT -:. --. .. --- ..: _ _ ...BEG/,(TP.24TECT?STA; D. t 9T ?C_.5?13/7 - - ---- BEGIA(PROPOSE D 2-95',P/K/217f APT. o• y I I iGt/TCHELL COC/NTy. ,5,e /3/ 2' RENF,eO ?eD, SHEET /O OF /6 • ? I Z ?O/VAL ..'- ::.:_ - - ---:•BK 20/.. 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