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HomeMy WebLinkAbout20100817 Ver 1_Application_20101004 STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION BEVERLY EAVES PERDUE GOVERNOR EUGENE A. CONTI, JR. SECRETARY September 30, 2010 ? @90MR Mr. Brian Wrenn ?w( _ D Division of Water Quality OC I - 4 2010 401/Transportation Permitting Unit 100817 ? 1650 Mail Service Center MEX4N MAN0MNftTERWANGl Raleigh, NC 27699-1650 SUBJECT: Pipe Replacement/Secondary Road Paving on SR 2274 (Gant Road), Gaston County Dear Mr. Wrenn: The North Carolina Department of Transportation requests authorization for the replacement of a 40-foot long, 24" CMP with a 60-foot long, 36" HDPE which was done in conjunction with a secondary road paving project on SR 2274 (Gant Road) in Gaston County. Due to the excessive amount of metal debris and trash, etc. around the outlet end of the pre-existing pipe, the pipe itself could not be located; therefore, the pipe neither length nor invert elevations were known. Due to these unknown factors, excavation of the old pipe and debris was allowed to determine pre-existing pipe information and to develop an adequate plan for pipe replacement. The replacement pipe placed on different skew at the inlet resulted in 7 feet of upstream channel loss. After removal of some of the debris which had placed on the stream channel by the adjacent property owner, 10 feet of downstream channel was reconstructed and stabilized with coir fiber matting. Five feet of riprap was used at the pipe inlet and outlet for structure stabilization. Also, due to the steep slope of the upstream channel (4%), the pipe was placed on streambed grade to prevent upstream destabilization. Temporary cofferdams and bypass pumping were used to manage the streamflow during construction. The scope of the work resulted in 47 feet of permanent impacts to an unnamed tributary to Long Creek, which is classified as Class C waters by the Division of Water Quality. The project area is not located within 'h mile of any critical watershed area nor is SR 2274 a rural or urban arterial; therefore, hazardous spill basins are not required. Enclosed is the hazardous spill basin checklist. This office has conducted a GIS and field survey for the project for historical sites and threatened/endangered species sites. No sites listed on the National Register of Historic Places are located in the vicinity of the project nor did there appear to be any eligible structures. The State Historic Preservation office reviewed and cleared the secondary road project 2/4/08 (ER 08-0068). Post Office Box 47 Shelby, North Carolina 28151-0047 i SR 2274, Gant Road Page 2 September 30, 2010 The federally listed species for Gaston County (USFSW listed date January 31, 2008) include Schweinitz's sunflower (Helianthus schnveinitzii) - Endangered (E) and the Bog turtle (Glyptemys muhlenbergii)- Threatened due to Similarity of Appearance (T SIA). National Heritage Program records document the nearest Schweinitz's Sunflower location approximately 4.0 miles east of the proposed project area. The sunflower is usually found in upland open areas protected from shade or excessive competition. There is no potential habitat within the proposed project area; however, no species were observed during the site visit. No impact on the species is anticipated. National Heritage Program records document the nearest bog turtle location approximately 2.0 miles north of the proposed project area. Bog turtles are usually found in bogs, marshes, and wet pastures. There is no suitable habitat located within the project area and no species were observed. T/SA species are not subject to Section 7 consultation; however, no impact on this species is anticipated. I have enclosed a pre-construction notification for a NW914, sketches of planned activities, erosion control plans, and location maps relative to the project. Project information for the 401 Automated Payment Procedure is as follows: 0 Work order number: 150456-55120005-12C.036069-3126 • TIP#: NA • Project Category: $240.00 Fee If you have any questions or concerns please feel free to contact me at (704) 480-9044. Thank you for your time and consideration on this matter. Respectfully yours, M.L. Holder, P.E. Division Engineer Twelfth Division BY: Trish Simon Division 12 Environmental Supervisor Enclosures Cc: Polly Lespinasse, Division of Water Quality, Mooresville Regional Office o? e WArFgQc oqqiiii? - Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre-Construction Notification PC Form A. Applicant Information 11. Processing Ila. Type(s) of approval sought from the Corps: El Section 404 Permit ? Section 10 Permit 11 b. Specify Nationwide Permit (NWP) number: or General Permit (GP) number: 1 c. Has the N WP 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 1e. Is this notification solely for the record because written approval is not required? For the record only for DWQ 401 Certification: ? Yes N No For the record only for Corps Permit: ® Yes ? No If . 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 'I g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 In below. ? Yes ® No I h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? ? Yes ® No Project Information 2a. Name of project: SR 2274 (Gant Road) 2b. County: Gaston 2c. Nearest municipality / town: Dallas 2d. Subdivision name: NA 2.e. NCDOT only, T.I.P. or state project no: 12C.036069 3. Owner Information 3a. Name(s) on Recorded Deed: NCDOT Right of Way 3b. Deed Book and Page No. 3c. Responsible Party (for LLC i f applicable): 3d. Street address: 3e. City, state, zip: 3f . Telephone no.: 3g. Fax no.: 3h . Email address: Page 1 of 11 PCN Form -Version 1.3 December 10, 2008 Version 14. Applicant Information (if different from owner) 4a. Applicant is: ? Agent ? Other, specify: 14b. Name: Mike Holder 4c. Busines s name (if applicable): N.C. Department of Transportation, Division 12 4d. Street address: 1710 East Marion Street 4e. City, state, zip: Shelby, NC 28151 '4f. Telephone no.: 704-480-9020 4g. Fax no., 704-480-5401 4h. Email address: mholder@ncdot.gov 5. Agent/Consultant Information (if applicable) 5a. Name: Trish Simon 5b. Business name (if applicable): N.C. Department of Transportation, Division 12 5c. Street address: 1710 East Marion Street Sd. City, state, zip: Shelby, NC 28151 iie. Telephone no.: 704-480-9044 5f. Fax no.: 704-480-5401 !ig. Email address: tsimon@ncdot.gov 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): NA 1 b. Site coordinates (in decimal degrees): Latitude: 35.3029 Longitude: - 81.1572 (DD.DDDDDD) (-DD.DDDDDD) 1c. Property size: <.10 acres (permit site) ; Entire project = .032 acres 2. Surface Waters I2a. Name of nearest body of water (stream, river, etc.) to UT to Long Creek proposed project: I2b. Water Quality Classification of nearest receiving water: Class C 2c. River basin: Catawba 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: Existing pipe on unpaved secondary road. Surrounding landuse is designated residential and cropland/pasture. !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: 80 3d. Explain the purpose of the proposed project: The purpose of the proposed work is to replace a deteriorating pipe and pave an unpaved secondary road for the safety of the travelling public. 3e. Describe the overall project in detail, including the type of equipment to be used: Replacement of a 40-foot long, 24" CMP with a 60-foot long, 36" HDPE. The replacement pipe placed on different skew at inlet resulted in 7 feet of stream loss. Due to the debris placed on the stream channel by the adjacent property owner at the outlet end of the prior pipe, 10 feet of downstream channel was reconstructed and stabilized with coir fiber matting. Five feet of riprap was used at the pipe inlet and outlet for structure stabilization. Project constructed using typical heavy equipment (trackhoe, backhoe, etc.). 4. Jurisdictional Determinations sta. Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / Yes ®No ? Unknown 1 project (including all prior phases) in the past? Comments: Jurisdictional evaluation made by Div 12 DEO. 4b. If the Corps made the jurisdictional determination, what type ? Preliminary ? Final of determination was made? 4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company: Name (if known): Other: 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. ( 5. Project History 5 a. Have permits or certifications been requested or obtained for ? Yes ® No ? Unknown this project (including all prior phases) in the past? 5 b. If yes, explain in detail according to "help file" instructions. Page 3 of 11 PCN Form -Version 1.3 December 10, 2008 Version 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 1a. 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) (if known) DWQ - non-404, other) (acres) or Temporary IW1 ? P ? T ? Yes ? Corps ? No ? DWQ 'W2 ? P ? T ? Yes ? Corps ? No ? DWQ W3 ? P ? T ? Yes ? Corps ? No ? DWQ W4 ? PEI T ? Yes ? Corps ? No ? DWQ ? Yes ? Cor s W5 ?P?T p _ ? No ? DWQ W6 ? P ? T ? Yes ? Corps ? No ? DWQ 2g. Total wetland impacts 21h. 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) intermittent DWQ - non-404, width (linear or Temporary (INT)? other) (feet) feet) (T) S1 ®P ? T Increase in pipe length LIT to Long Creek ? PER ® INT ® Corps ® DWQ 1.5 20 32 ® P ? T Loss in upstream [:1 PER ® Corps 1.5 7 channel ® INT ® DWQ : ®P ? T Downstream channel ? PER ® Corps 1.5 10 I 1 relocation/reconstruction ® INT ® DWQ EIS4 ®P ? T Riprap stabilization @ ? PER ® Corps 1.5 10 I inlet & outlet ® INT ® DWQ I [:1 P ®T Cofferdam/bypass E] PER ® Corps 1.5 80 pumping ® INT ® DWQ S6 ? P F1 T ? PER ? Corps I ? INT ? DWQ 3h. Total stream and tributary impacts 47 3i. Comments: Page 5 of 11 PCN Form - Version 1.3 December 10, 2008 Version 1 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. Open water impact number - Permanent (P) or Temporary 4b. Name of waterbody (if applicable) 4c. Type of impact 4d. Waterbody type 4e. Area of impact (acres) 101 ?P?T 102 ?P?T 103 ?P?T 104 ?P?T 14L Total open water impacts 14g. Comments: 15. Pond or Lake Construction if and or lake construction proposed, then com lete the chart below. 5a. Pond ID 5b. Proposed use or purpose of 5c. Wetland Impacts (acres) 5d. Stream Impacts (feet) 5e. Upland (acres) ,number 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: :ii. Expected pond surface area (acres): 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 an impacts require mitigation, then you MUST fill out Section D of this form. 6a. ? Neuse ?Tar-Pamlico ? 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) for impact Stream name mitigation (square feet) (square feet) or Temporary required? I131 ?P?T ?Yes ? No B2 ?P?T ?Yes ? No B3 ?P?T ?Yes ? No 6h. Total buffer impacts Bi. Comments: D. Impact Justification and Mitigation 1. Avoidance and Minimization la. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. Due to the steep slope of the upstream channel, the pipe is placed on streambed grade to prevent upstream destabilization. The channel is an intermittent channel with no observable fish populations. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. Channel reconstruction at outlet following natural channel design prinicipals (stabilized with coir fiber matting). 2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State ?_a. 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 mitigat ion option will be used for this project? ? 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 Page 7 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 14d. Buffer mitigation requested (DWQ only): square feet 14e. Riparian wetland mitigation requested: acres I4f. Non-riparian wetland mitigation requested: acres I4g. Coastal (tidal) wetland mitigation requested: acres !4h. Comments: 15. Complete if Using a Permittee Responsible Mitigation Plan 15a. 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 $b. 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) ?one 1 3 (2 for Catawba) ?one 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). fh. 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 la . Does the project include or is it adjacent to protected riparian buffers identified ? Yes ®No within one of the NC Riparian Buffer Protection Rules? 1b. If yes, then is a diffuse flow plan included? If no, explain why. ? Yes ? No Comments: 12. Stormwater Management Plan I2a. What is the overall percent imperviousness of this project? 0% I2b. Does this project require a Stormwater Management Plan? ? Yes ®No I2c. If this project DOES NOT require a Stormwater Management Plan, explain why: Com plies with NCDOT's individual NPDES permit NCS000250. (Implementation, management, and inspection of erosion control devices and control of discharge sources (ie. construction equipment). ,2d . If this project DOES require a Stormwater Management Plan, then provide a brief, na rrative 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 $a. In which local government's jurisdiction is this project? NA ? Phase II 3b. Which of the following locally-implemented stormwater management programs ? NSW ? USMP apply (check all that apply): ? Water Supply Watershed ? Other: 3c. Has the approved Stormwater Management Plan with proof of approval been ? Yes ? No attached? 4. DWQ Stormwater Program Review ? Coastal counties ? HOW 4a. Which of the following state-implemented stormwater management programs apply ? ORW (check all that apply): ? Session Law 2006-246 ? Other: I 4 b. Has the approved Stormwater Management Plan with proof of approval been attached? ? Yes ? No 5! DWQ 401 Unit Stormwater Review 5 i a. Does the Stormwater Management Plan meet the appropriate requirements? ® Yes ? No i 5 b. 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) 1a. 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 N No (North Carolina) Environmental Policy Act (NEPA/SEPA)? i 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 letter.) i ? Yes ? No Comments: NA 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 R No or Riparian Buffer Rules (15A NCAC 26 .0200)? 2b. Is this an after-the-fact permit application? N Yes ? No 2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s): Due to the excessive amount of metal debris and trash, etc. around the outlet end of the pre-existing pipe, the pipe itself could not be located; therefore, the length of the pipe nor the location of the pipe inverts were known. Due to these unknown factors, i;xcavation of the old pipe was allowed to determine pre-existing pipe information and to develop an adequate plan for pipe replacement. t. Cumulative Impacts (DWQ Requirement) ia. Will this project (based on past and reasonably anticipated future impacts) result in ?Yes N 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. The project is a minimum criteria project which has low potential for cumulative/indirect impacts and will not result in additional development which could impact water quality. 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 5. Endangered Species and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or ? Yes ®No habitat? I5b. Have you checked with the USFWS concerning Endangered Species Act ? Yes ®No impacts? ? Raleigh ISc. If yes, ind icate the USFWS Field Office you have contacted. ? Asheville Sd. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? NC Natural Heritage Program database. I6. Essential Fish Habitat (Corps Requirement) 6a. Will this project occur in or near an area designated as essential fish habitat? ? Yes ®No $b. What data sources did you use to determine whether your site would impact Essential Fish Habitat? No salt marshes, oyster reefs, or seagrass beds in the vicinity of the project. 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? The State Historic Preservation office reviewed and cleared project 2/4/08 (ER 08-0068). t?. Flood Zone Designation (Corps Requirement) 8a. Will this project occur in a FEMA-designated 100-year floodplain? ? Yes ® No Sb. If yes, explain how project meets FEMA requirements: 8c. What source(s) did you use to make the floodplain determination? FEMA FIRM panal number: 3710355700J q,36LIa Applicant/Agent's Printed Name Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 11 of 11 PCN Form -Version 1.3 December 10, 2008 Version N .1•! 1 e,ugi; S taI?Claeia. /? I II kh?, Pipe r Replacement/Secondary Road paving 11 t. J ,v Sew 10 f % ?Lo.0'p o, ?\ i Cyr }f i -M V11-I / 1 I ?J 1 ?t i tom= -1 NN ofF: c A4 - ; c lc 111 ch=Id /i` .` ?/ Sprt!D r l 10 al r)j ?? ? r. re \?r f ? ? - tl ?I r1 7 Name: GASTONIA NORTH Location: 035.3028709° N 081.1571650° W Date: 9/29/2010 Caption: Secondary Road Paving/Pipe Replacement, SR 2274 (Gant Rd), Scale: 1 inch equals 1333 feet UT to Long Creek, Class C Water, Catawba River Basin Copyright (C) 1998, Maptech, Inc ° g9 68 a°o C " / 68 cc C b Lo 68 ° b ° /9fi 88 C l? e SS 6G 0, 9. /g 06 rn o /gG SS ro G] X8'68 o a gL 8g n n _ m u o iy'06 l?] a SS lij Z•p6 '°a n ?Z'8S o u ' `" MiI --T0 88 a 0s 68 I N LS I I b v t ° NI ' 8 I t1I`I tm ? 9S ? x y a ? b I u O ° n ? ?, I e a A m 'O G m r?^ ? ? ? I o Q b 0 0 u I o I z ? o Zr?B N I ° I m F ^ o I I I . ?U IN I A y ? fi 873p s 2 I I O b I I w ° v a p6 88 fi5 68 N I N° m o Q ° o ° i m c ^ m /fig a - 9 6S m° ° S O * a P O CD o °' ZO X68 a s o S o„= o_ ? 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O y U E 6 - w N O¢ Oa ^ O N O ' 3 LL C y O K3 z ? z o V Z Q zN z O¢ yW J O y ¢? 6 M O ¢ O O W S W W ¢ U O N O 2 2 lxw 2V a^ LLWU M 2, £ a n - y J opx wx Z w OWZ mz0 Q ¢WW JWW O U oz¢ J6J ` y Swf aF'J r U ?_ H=LL W a ^ w w Y W U F i ? „0a D O_ ss I y? J ?a0 N ¢W i .? ti QQJ2 /!? w F I LL £ 6 Q Oy V 26 o l J i w lw V/ Z _? s? I m =w rA H rW y I c 3 uu C ¢u zz z, ao LU a? u^ I y H V L z z ? ? Q C s ? Q G M CL I W m oy rLi? LL ?-I, 1? 2 y f i -r M F O W I O O y O~ 4,1 U z Wy w u a iy Q? I a O 2 O~ QJ a 2 ou W ¢ v z- do a^ Wz u J ?- W LL O ¢ w H 0LL O O Pipe Replacement/Secondary Road Paving Gant Road, SR 2274, Gaston County Downstream area before pipe replacement ,f )ownstream Post-construction) Upstream (Post-construction) NCDOT HAZARDOUS SPILL BASIN CHECKLIST Division: 19 County: C,acrnn Project ID: 12.203611 River Basin: Catawba Bridge No: NA Route: SR 2274, Gant Road Stream: UT to Long Creek Water Quality Criteria: Yes No Stream Crossing Blue Line On USGS r r? ORW r r WS1 r r WS 11,111 OR IV, Crossing Within 0.5mi of W.S. Critical Area r r Roadway Criteria: Route Designation- Yes No Arterial Urban r r Arterial Rural C F Additional Site Information: Yes No Is a Hazardous Spill Basin Required? r it Criteria Based Upon NCDOT "Best Management Practices for the Protection of Surface Waters" (March, 1997). EROSION AND SEDIMENTATION CONTROL PLAN GASTON COUNTY, NC DATE August 5, 2010 DIVISION OF HIGHWAYS DEPARTMENT OF TRANSPORTATION STATE OF NORTH CAROLINA W.O. # 12C.036069 PURPOSE The purpose of this Erosion and Sedimentation Control Program of the Division of Highways is to control accelerated erosion and sedimentation resulting from the construction and maintenance of roads and highways in North Carolina. This program is developed pursuant to the requirements contained in the Rules and Regulations for (Erosion and Sedimentation Control which were adopted by the North Carolina Sedimentation Control Commission on April M 1974. PROJECT DESCRIPTION Gantt Rd. The NCDOT will be grading, widening, and paving Gantt Rd. No problem areas are anticipated. The work will be completed during the 2010/2011 construction season. CONSTRUCTION SEQUENCE 1. Grading to be started by state forces. Install all necessary silt fences, sediment basins, and check dams and begin clearing construction area. 2. Rough grade the construction area and begin installing any storm drainage and/or cross lines. Install inlet and outlet protection as storm drainage is being installed. 3. As an area is brought to finish grade and the black base is placed for the road, and the shoulder finished, then seed, mulch and tack should be provided for denuded areas. 4. Leave all erosion control devices in place until vegetation has been established sufficiently to withstand erosion. DO NOT remove any erosion control devices until directed by the County Engineer. MAINTENANCE PLAN 1. All erosion and sediment control practices will be checked for stability and operation following every runoff producing rainfall but in no case less than once every week. Any repairs will be made immediately to maintain all practices as designed. 2. Sediment will be removed from behind the sediment fence when it becomes about 0.5 feet deep at the fence. The sediment fence will be repaired as necessary to maintain a barrier. 3. All seeded areas will be fertilized, reseeded as necessary and mulched according to the instruction in the seeded specifications to maintain a vigorous, dense vegetative cover. 4. Outlet protection will be installed when outlets are installed. Filter fabric will be placed under the entire stone section and will be repaired and replaced if damaged during any phase of construction. 5. Sediment will be removed from the basin when it reaches 1.0 foot below the emergency spillway. The filter stone is to be cleaned or replaced when basin no longer drains properly. GROUND COVER FOR SLOPES, FILLS AND OTHER GRADED AREAS The angles for graded slopes and fills shall be no greater than the angle which can be retained by vegetative cover or other adequate erosion control devices or structures. Seeding should be done in accordance with the specifications for that season of the year. Additional erosion control measures may be required depending on the actual field conditions. 4.2 PIPE/CULVERT INSTALLATION (Taken from BMP Aug.2003, page 26) This section describes the steps to take when an existing pipe or culvert is being constructed or replaced on a jurisdictional stream. 1. Prior to installing Erosion Control, identify permit conditions and impact area limits. Contact the Division Environmental Officer (DEO) for information on permit drawings or jurisdictional areas. Erosion Control 2. Install temporary silt fence or sift ditch to treat runoff from the work area or isolate the work area from the jurisdictional areas, such as wetlands or riparian buffers (See Section 5.1). 3. Install Temporary Rock Sift Check Type "A" or Temporary Sediment Dam Type "B" in ditch lines to contain sediment prior to discharge into the watercourse (See Section 5.1). - Do not install Temporary Rock Silt Check Type "A" or Temporary Sediment Dam Type "B" in stream channel Manaoina the Water Course 4. On larger streams, flow diversion may be used to isolate the work area using bypass pumping, piped diversion or fabriclined channel (See Section 5.2). On smaller streams, or at low flow conditions, an impervious dike may be used to temporarily dewater the work area within the stream channel (See Section 5.3). - All temporary in-stream structures must be installed with geotextlle fabric beneath them, and removed in their entirety immediately upon completion of in-stream work " In CAMA-AECs, the type of flow diversion is identified in the permit. 5. Temporary stream crossings may be utilized in order to provide equipment access, if underlain by geotextile fabric, so that the riprap may be entirely removed (See Section 5.5). " Confirm that the temporary stream crossing is shown in the permit drawings as an approved temporary impact. - In CAMA-AECs, the type of temporary Managing the Work Area 6. Dewatering devices are typically needed to keep the work area dry (see Section 5.4). The permit conditions and the amount of available space and length of pipe replacement or project limits will determine the type of dewatering device to be used. Every effort should be made to minimize the extent of the area to be dewatered and the length of time the site is dewatered. " In CAMA-AECs, the type of dewatering device is identified in the CAMA permit 7. Install the pipe/culvert per the NCDOT standards and specifications, and any specified permit conditions. Note that pipes and culverts shall be buried a minimum depth below the existing streambed, as defined below, in order to allow for aquatic organism passage during low flow conditions. Variance may be obtained by the DEO to allow for deviations in pipe burial depths due to bedrock, steep gradients in the stream channel, existing headcutting, potential for drainage of upstream wetlands, or other concerns. • Foundation material shall be confined to the pipe culvert area and shall not be placed in the existing stream channel outside of the permitted impact area. • Excavation of the stream channel shall not exceed 10 feet on either end of the new pipe or culvert unless the stream is being relocated per Section 4.9, or if indicated in the permit • Within river basins subject to the Riparian Buffer Rules, projects may be exempt if work in the stream channel is limited to a total of 40 feet of additional impact, including pipe extension. • In CAMA AECs (within the twenty coastal counties), all pipes and culverts must be buried one foot below the existing average streambed elevation. • In other parts of the state, pipes(culverts must be buried as follows: o Culverts 48-Inches in diameter or greater shall be buried one foot below the streambed elevation. Average streambed elevation shall be measured from multiple measurements taken outside of the area of scour or road crossing disturbance, outside of the ROW limits, if necessary. o Culverts less than 48-inches shall be buried a depth equal to 20•/ of the pipeiculvert diameter, such as the following examples. The hydraulic conveyance of the culvert however should not be compromised. Examples: • 36" = 7" • 30„ = 6„ •24"=5n • 18" = 4" 8. Stream pattern, dimension and profile shall be maintained by pipe/culvert installation. • A 4-foot diameter pipe culvert installed in a 2-foot wide stream may require baffles in order to maintain aquatic organism passage (AOP) during low flow conditions. • Pipe size should at least match stream width wherever possible, but a 2-foot wide culvert installed In a 4-foot wide stream may also need baffles to reduce velocities. • Two 48 inch pipes installed in a 10-foot wide stream would require that one pipe be installed at a lower elevation, and in alignment with the low flow stream channel elevation, so that AOP is maintained during low flow conditions. • The low flow pipe should be aligned with the deepest part of the stream channel, so that flow is maintained during low flow conditions. • No "live" or fresh concrete shall come into contact with jurisdictional waters until the concrete has cured. 9. Install the riprap shoulder slope and outlet protection on upstream and downstream channels where indicated on the permit drawings (See Section 5.6). Do not exceed approved limits in the permit. Contact the DEO if the permit or permit drawings are not clear. • Riprap shall consist of clean rock or masonry material free of debris or pollutants (such as asphalt). • Outlet protection should be countersunk at least one foot below the average stream bed elevation. • Placement of riprap within jurisdictional waters must be the minimum necessary to protect or ensure shoulder slope and streambank stability. 10. Remove temporary flow diversion or dewatering devices and accumulated sediment before allowing stream flow to resume through the new pipe or culvert. • The impervious dike shall be completely removed to pre-project conditions. • Care should be taken to not disturb or destabilize the undisturbed streambed during removal of temporary devices. 11. Stream realignment can occur within approved permit impact limits. Minimize sharp or acute angles in stream alignment wherever possible. Stream channel pattern, dimension and profile should be maintained similar to the upstream and downstream stream reach. 12. Bioengineering techniques may be used to stabilize streambanks where feasible. 13. Begin backfill operations. Intermediate erosion and sedimentation control BMPs shall be installed prior to the backfill operation to provide containment between the work area and the watercourse. 14. If the pipe/culvert is part of a larger roadway project, enough backfill should be placed to allow for the removal of the temporary stream crossing. If no temporary stream crossing is required then enough backfill should be placed to prevent a washout during a minor storm event. Ground Stabilization 15. Upon completion of backfill operations, prepare slopes and other disturbed areas and stabilize (See Section 5.6). 16. 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