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Home My WebLink About20130087_Scoping Comments_20111219A � NUDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H Sullins Dee Freeman Governor Director Secretary December 19 2011 MEMORANDUM TO Mark W Craig PE Division 5 Bridge Program Manager FROM Rob Ridings NCDWQ Transportation Permitting Unit Raleigh SUBJECT Scoping Review of NCDOT s Proposed Bridge Replacement Projects for Granville and Person Counties In reply to your correspondence dated received December 8 2011 in which you requested comments for the above referenced projects the NCDWQ offers the following comments Project - Specific Comments 1 Bridges 380021 380022 380023 and 380233 These projects impact class NSW waters of the State NCDWQ is very concerned with sediment and erosion impacts that could result from these projects NCDWQ recommends that highly protective sediment and erosion control BMPs be implemented to reduce the risk of nutrient runoff to surface waters and tributaries NCDWQ requests that road design plans provide treatment of the storm water runoff through best management practices as detailed in the most recent version of NCDWQ s Stormwater Best Management Practices 2 Bridge 720216 Review of the project reveals the presence of surface waters classified as (HQW) High Quality Waters of the State in the project study area This is one of the highest classifications for water quality Pursuant to 15A NCAC 2H 1006 and 15A NCAC 2B 0224 NCDOT will be required to obtain a State Stormwater Permit prior to construction except in North Carolina s twenty coastal counties Bridges in the Neuse River Basin Riparian buffer impacts shall be avoided and minimized to the greatest extent possible pursuant to 15A NCAC 2B 0233 4 Bridges in the Tar Pamlico River Basin Riparian buffer impacts shall be avoided and minimized to the greatest extent possible pursuant to 15A NCAC 2B 0259 One Transportation Permitting Unit 1650 Mad Service Center Raleigh North Carolina 27699 1650 NorthCay+rO /h /na Phone 919 - 807 -6403 vVait u all y Internet http 1lh2o enr state nc uslncwetlandsl An Equal Opportunity \ Affirmative Action Employer Stream Name Beaver Dam Creek Beaver Dam Creek Beaver Dam Creek UT to Coon Creek UT to South Hyco Creek River Basin & Subbasm Stream Classifications Stream Index Number Bridge Number NEU 01 NEU O1 NEU 01 TAR 01 ROA 05 WS IV NSW WS IV NSW WS IV NSW C NSW WS II HQW 27 12 (0 4) 27 12 (0 4) 27 l2 4) 28 11 1 5 22 58 4 (0 5) 380021 380022 380023 380233 720216 Project - Specific Comments 1 Bridges 380021 380022 380023 and 380233 These projects impact class NSW waters of the State NCDWQ is very concerned with sediment and erosion impacts that could result from these projects NCDWQ recommends that highly protective sediment and erosion control BMPs be implemented to reduce the risk of nutrient runoff to surface waters and tributaries NCDWQ requests that road design plans provide treatment of the storm water runoff through best management practices as detailed in the most recent version of NCDWQ s Stormwater Best Management Practices 2 Bridge 720216 Review of the project reveals the presence of surface waters classified as (HQW) High Quality Waters of the State in the project study area This is one of the highest classifications for water quality Pursuant to 15A NCAC 2H 1006 and 15A NCAC 2B 0224 NCDOT will be required to obtain a State Stormwater Permit prior to construction except in North Carolina s twenty coastal counties Bridges in the Neuse River Basin Riparian buffer impacts shall be avoided and minimized to the greatest extent possible pursuant to 15A NCAC 2B 0233 4 Bridges in the Tar Pamlico River Basin Riparian buffer impacts shall be avoided and minimized to the greatest extent possible pursuant to 15A NCAC 2B 0259 One Transportation Permitting Unit 1650 Mad Service Center Raleigh North Carolina 27699 1650 NorthCay+rO /h /na Phone 919 - 807 -6403 vVait u all y Internet http 1lh2o enr state nc uslncwetlandsl An Equal Opportunity \ Affirmative Action Employer General Comments Regarding Bridge Replacement Projects NCDWQ is very concerned with sediment and erosion impacts that could result from this project NCDOT shall address these concerns by describing the potential impacts that may occur to the aquatic environments and any mitigating factors that would reduce the impacts 2 If foundation test borings are necessary it shall be noted in the document Geotechnical work is approved under General 401 Certification Number 3687/Nationwide Permit No 6 for Survey Activities 3 If a bridge is being replaced with a hydraulic conveyance other than another bridge NCDWQ believes the use of a Nationwide Permit may be required Please contact the US Army Corp of Engineers to determine the required permit(s) If the old bridge is removed no discharge of bridge material into surface waters is allowed unless otherwise authorized by the US ACOE Strict adherence to the Corps of Engineers guidelines for bridge demolition will be a condition of the 401 Water Quality Certification Whenever possible NCDWQ prefers spanning structures Spanning structures usually do not require work within the stream or grubbing of the streambanks and do not require stream channel realignment The horizontal and vertical clearances provided by bridges shall allow for human and wildlife passage beneath the structure Fish passage and navigation by canoeists and boaters shall not be blocked Bridge supports (bents) should not be placed in the stream when possible 6 Bridge deck drains shall not discharge directly into the stream Stormwater shall be directed across the bridge and pre treated through site appropriate means (grassed swales pre formed scour holes vegetated buffers etc ) before entering the stream Please refer to the most current version of NCDWQ s Stormwater Best Management Practices 7 If concrete is used during construction a dry work area shall be maintained to prevent direct contact between curing concrete and stream water Water that inadvertently contacts uncured concrete shall not be discharged to surface waters due to the potential for elevated pH and possible aquatic life and fish kills If temporary access roads or detours are constructed the site shall be graded to its preconstruction contours and elevations Disturbed areas shall be seeded or mulched to stabilize the soil and appropriate native woody species shall be planted When using temporary structures the area shall be cleared but not grubbed Clearing the area with chain saws mowers bush hogs or other mechanized equipment and leaving the stumps and root mat intact allows the area to re vegetate naturally and minimizes soil disturbance Sediment and erosion control measures sufficient to protect water resources must be implemented and maintained in accordance with the most recent version of North Carolina Sediment and Erosion Control Planning and Design Manual and the most recent version of NCS000250 10 All work in or adjacent to stream waters shall be conducted in a dry work area unless otherwise approved by NCDWQ Approved BMP measures from the most current version of NCDOT Construction and Maintenance Activities manual such as sandbags rock berms cofferdams and other diversion structures shall be used to prevent excavation in flowing water 11 Heavy equipment shall be operated from the bank rather than in stream channels in order to minimize sedimentation and reduce the likelihood of introducing other pollutants into streams This equipment shall be inspected daily and maintained to prevent contamination of surface waters from leaking fuels lubricants hydraulic fluids or other toxic materials 12 In most cases the NCDWQ prefers the replacement of the existing structure at the same location with road closure If road closure is not feasible a temporary detour shall be designed and located to avoid wetland impacts minimize the need for clearing and to avoid destabilizing stream banks If the structure will be on a new alignment the old structure shall be removed and the approach fills removed from the 100 year floodplain Approach fills shall be removed and restored to the natural ground elevation The area shall be stabilized with grass and planted with native tree species Tall fescue shall not be used in riparian areas 13 Any anticipated dewatering or access structures necessary for construction of bridges should be addressed in the CE It is understood that final designs are not determined at the time the CE is developed However the CE should discuss the potential for dewatering and access measures necessary due to bridge construction General Comments if Replacing the Bridge with a Culvert Placement of culverts and other structures in waters streams and wetlands shall be below the elevation of the streambed by one foot for all culverts with a diameter greater than 48 inches and 20 percent of the culvert diameter for culverts having a diameter less than 48 inches to allow low flow passage of water and aquatic life Design and placement of culverts and other structures including temporary erosion control measures shall not be conducted in a manner that may result in dis equilibrium of wetlands or streambeds or banks adjacent to or upstream and down stream of the above structures The applicant is required to provide evidence that the equilibrium is being maintained if requested in writing by NCDWQ If this condition is unable to be met due to bedrock or other limiting features encountered during construction please contact the NCDWQ for guidance on how to proceed and to determine whether or not a permit modification will be required 2 If multiple pipes or barrels are required they shall be designed to mimic natural stream cross section as closely as possible including pipes or barrels at flood plain elevation floodplam benches and /or sills may be required where appropriate Widening the stream channel shall be avoided Stream channel widening at the inlet or outlet end of structures typically decreases water velocity causing sediment deposition that requires increased maintenance and disrupts aquatic life passage Riprap shall not be placed in the active thalweg channel or placed in the streambed in a manner that precludes aquatic life passage Bioengmeermg boulders or structures shall be properly designed sized and installed 4n} anticipated batik stabilization associated , ith culvert installations or exte ^sion, would be addressed in the Categorical Exclusion (CE) document and permit applications It is understood that final designs are not determined at the time the CE is developed However the CE should discuss the potential for bank stabilization necessary due to culvert installation Thank you for requesting our input at this time NCDOT is reminded that issuance of a 401 Water Quality Certification requires that appropriate measures be instituted to ensure that water quality standards are met and designated uses are not degraded or lost If you have any questions or require additional information please contact Rob Ridings at 919 807 6403 cc Eric Alsmeyer US Army Corps of Engineers Raleigh Field Office Chris Murray Division 5 Environmental Officer Travis Wilson NC Wildlife Resources Commission File Copy c7�`H4 VICINITY K/r FR NORTH CAROLINA DEPARTMENT OF TRANSPORTATION S 6 DIVISION OF HIGHWAYS GRANVILLE COUNTY REPLACE BRIDGE NO 380023 ON SR 1700 (BRASSFIELD ROAD) OVER BEAVER DAM CREEK 17BP5R27 LA Flgure 1 0 'z-7- ez -Co 1 Proposed Detour SR 1710 (Lawrece y ad) to SR 1709 (Horseshoe Road) to SR 1720 (Pope l Road) Detour Length 6 males ADT 2400 (2008) Bridge on Detour Granville 27 (Not Posted) v�rg l Al �.� 39 A 4 d 49 96 kr N. k � IToxi vile M 5 i Sto 11 3 44 IV A N`aX i Oak 11 I �1 1`' t �J iamb r 0 N,GRANVI E' r � io S a t o 3 r �1 2 S I J� , It m {s +� hfy xe n INA 4 f Y X^ 5 Z7Fig _ ; t -4- i% 5 i 1 L k N' iT ✓r wT 'y: 9 yy t F yt �q 4 � �. 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