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HomeMy WebLinkAbout20140513 Ver 1_Application_20140523STATE o� NORTH CAROLINA DEPARTMENT OF TRANSPORTATION Pat McCrory GOVERNOR May 13th, 2014 U.S. Army Corps of Engineers Regulatory Field Office Post Office Box 1000 Washington, N.C. 27889-1000 Attention: Tracey Wheeler Tony Tata SBCRETARY Subject: Request for a GP 291 Permit for the replacement of Bridge # 3 over Deep Creek on US 264 in Dare County. WBS # 17BP1.R.50 Dear Ms. Wheeler, The North Carolina Department of Transportation is requesting the issuance of a GP 291 permit for the replacement of Bridge # 3 in Dare County. The bridge is located on US 264 approximately 2.2 miles north of the Hyde County boundary line. The bridge spans Deep Creek, which is within the Tar-Pamlico River Basin. Deep Creek is classified by DWQ as class "SA, HQW" waters. Deep Creek is also classified as a"Primary Nursery Area" by the NC Marine Fisheries. NCDOT will adhere to the Marine Fisheries in-water work moratorium of April 1— September 30. Bridge # 3 is currently a six-span wood and concrete structure with a concrete deck supported by five interior bents with concrete caps on timber piles. The existing structure is 100 ft. long by 26 ft. wide. This structure will be entirely removed using NCDOT's BNIl''s and guidelines for bridge removal. The proposed bridge will be replaced along its existing alignment with a slight 4 foot shift to the south. This slight alignment shift will allow for staged construction and the ability to maintain one lane of open traffic, through the project area. The new bridge will be a three span structure totaling, 150' in length by 30' wide. It will be comprised of a cast in place concrete deck and bents, supported by prestressed concrete piles and girders. Jurisdictional wetland and surface water impacts have been avoided and minimized. Minimization efforts include the use of sheet pile retaining walls and 2:1 slopes on all road shoulder areas. There will be no deck drains located on the bridge structure. The storm water outlets have been diverted to 4locations back away from the main stem of Deep Creek and placed where vegetated buffer treatment will occur. The resulting impacts from road shoulder and bridge approach construction, is 0.106 acres of permanent coastal wetland impacts, and 0.001 (54 sq. ft.) acres of temporary coastal 113 Airport Dr., Suite 100, Edenton, NC 27932 — Phone: (252) 482-1850 Fax: (252) 482-8722 wetland impact (utility bore operation). There is 22 feet of sheet pile shoreline stabilization located at site 2, which will result in 0.001 acres (54 sq.ft) of surface water impact. The sheet pile stabilization at site 2 is required around the transition, from the bridge abutment to the road shoulder. The impact areas are located and detailed on the provided permit drawings. A utility relocation will also be required for the bridge replacement. The one utility involves directionally boring a fiber optic cable 825ft. in length and approximately 40 ft. below the bed of Deep Creek The boring machine operation will work from the shoulder of the roadway and will temporarily impact 54 sq. ft. of fringe coastal wetland along the road shoulder. The bridge replacement design has avoided and minimized impacts to the maximum extent practicable. To offset impacts, a longer bridge will allow for the restoration of approximately 1200 sq. ft. of coastal floodplain along Deep Creek This will be accomplished by removing the old bridge fill approaches and grading the elevation to match adjacent coastal wetlands. In addition to the floodplain restoration, the new bridge horizontal clearance increases by 50 feet, allowing for the enhancement of natural hydraulic flow regimes. Deep Creek experiences significant fluctuation in tides due to wind events. The enhanced hydraulic flow regime will improve the coastal marsh flooding events, located on the west side of US 264, and thus improving the overall health of the marsh ecological system. The marsh located on the west side of US 264, at the project area, is approximately 50 acres and relies on regular inundation from Deep Creek. Traffic will be maintained on-site by the use of stage construction and temporary lane closures. US 264 are a major route within this area and the use of an off-site detour involves over a 50 mile detour. Included with this letter are the location maps and PCN form. If you have questions please call me at (252) 482-1876. The permit fee can be charged to WBS # 17BP.1.R.50 Sincerely, Jerry Jennings Division One Engineer Clay Willis Division One Environmental Officer 113 Airport Dr., Suite 100, Fdenton, NC 27932 — Phone: (252) 482-1850 FaY: (252) 482-8722 a: :: _- _-. =_-: r.-.:=_- :-_ - _-- ..-: - �- . :�_ _--! — �— _ I, � _ _ � - --�: -- --- _ _�� ,��_�._-. � . _ � _ z, � =� _= --: -- -_- =-r: =: - -= -- �- =�-� � _ ', - - _- i - y :_ _� - � - -_ � -� — -- t----� -J -�-- _ � r - � --�.-: �'�-}-�,� � - -� - 1 � - -- � < <� - �- - _ �. -: � � _._.� _ _ - - --- :-�- i I '' I - -_��. _ �_ = � S- . `� � - , • , , 'i •� � ���L�_�_�f� ��-S�� � � - � rrV % ' - _ '-�� �-5 - - � — - --� _� '- ��- � �1 � � " r_ , 1�j, I� -1- - - - II ' : � �- _ -1= _ _ -� - _ - :-�-'- =.. : = : �_ _ _ i ti+ l � � : .- :-:�5��_ - ' ��--_ �" � �,LY �- -- -�- -- - i _ � _ _ �: � ;� - , � .: - � _ - : � _� � �.f�,. I - _ _ =_ � _ PROJECT LOCATION - --�--_'�"'" k`-"` �� 4 �,s�9 �-"-�- 1 `-. 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O C . -� 1 �-�-. yO � ��� a .iY,.0 h+ - - ,- �I!Y � r�f S}r`� C - , _ � � � 1 i' � _ �t !d' 'A � ^ - _. � __ _ . - . -.. � _. . < � -{ _ - __ . , -.I 1..'.._ `:f cO ' - _ �. _ ' 1, - "} - - � J . . . � ,`V�, � ' - r _ ' --if � I. • — _.�. � oY..fv,na �- �_ a.� — Source�. http�.11goto.arcgisonline.comlmapslUSA_Topo_Maps; 2011 National Geographic Society, i-cubed. 0 2,00o a,000 a,000 i2,000 is,000 Feet USGS TOPOGRAPHIC MAP ame BRIDGE 270003 NORTH CAROLINA SJM� 811113 �BY SS � 8!1/13 17 B P.1. R.50 N � 0 i. 1 Bridge Replacement # 3 on US 264 Deep Creek Dare County Quad Name Englehard NE 0.05 0.1 02 Miles Office Use Only: Corps action ID no. DWQ project no. Form Version 1.4 January 2009 Pre-Construction Notification (PCN) Form A. Applicant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: X Section 404 Permit Section 10 Permit 1 b. Specify Nationwide Permit (NWP) number: or General Permit (GP) number: GP 291 1c. Has the NWP or GP number been verified by the Corps? X Yes No 1d. Type(s) of approval sought from the DWQ (check all that apply): 401 Water Quality Certification — Regular X Non-404 Jurisdictional General Permit 401 Water Quality Certification — Express Riparian Buffer Authorization X 1 e. Is this notification solely for the record For the record only for DWQ For the record only for Corps Permit: because written approval is not required? 401 Certification: Yes X No Yes X 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 Yes X No fee program. 1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h X Yes No below. 1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)? X Yes No 2. Project Information 2a. Name of project: Bridge # 3 over Deep Creek 2b. County: Dare County 2c. Nearest municipality / town: Stumpy Point 2d. Subdivision name: Not Applicable 2e. NCDOT only, T.I.P. or state project no: WBS # 17BP.1.R.50 3. Owner Information 3a. Name(s) on Recorded Deed: NCDOT Bridge # 3, US 264 3b. Deed Book and Page No. 3c. Responsible Party (for LLC if applicable): 3d. Street address: 113 Airport Drive 3e. City, state, zip: Edenton, N.C. 27932 3f. Telephone no.: 252-482-1876 3g. Fax no.: 252-482-8722 3h. Email address: cwillis@ncdot.gov Page 1 of 10 PCN Form — Version 1.4 January 2009 4. Applicant Information (if different from owner) 4a. Applicant is: Agent Other, specify: 4b. Name: 4c. Business name (if applicable): 4d. Streetaddress: 4e. City, state, zip: 4f. Telephone no.: 4g. Fax no.: 4h. Email address: 5. Agent/Consultant Information (if applicable) 5a. Name: 5b. Business name (if applicable): 5c. Streetaddress: 5d. City, state, zip: 5e. Telephone no.: 5f. Fax no.: 5g. Email address: Page 2 of 10 B. Project Information and Prior Project History 1. Property Identification 1a. Property identification no. (tax PIN or parcel ID): 1 b. Site coordinates (in decimal degrees): Latitude: 35.6315 Longitude: -75.855 1 c. Property size: 1 acre 2. Surface Waters 2a. Name of nearest body of water to proposed project: Deep Creek 2b. Water Quality Classification of nearest receiving water: SA HQW 2c. River basin: ar-Pamlico River Basin 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. The project area is defined by extensive coastal marsh, Deep Creek, Bridge # 3 and US 264. The surrounding landscape is all in conservation, in ownership by the US Fish and Wildlife Service. There is no commercial development, other than US 264 and bridge # 3 within the project area. 3b. List the total estimated acreage of all existing wetlands on the property: 0.5 acres is an approximate estimate, which includes the entire surveyed property boundary. The wetlands begin at the toe of the road shoulder and extend throughout the Right-of-Way. 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: Approximately 60 feet of shoreline along Deep Creek, with 900 ft. of adjacent man-made canals boarding US 264. 3d. Explain the purpose of the proposed project: To replace bridge # 3 for the purpose of maintaining safe travel along the corridor of US 264. 3e. Describe the overall project in detail, including the type of equipment to be used: The existing six span wooden/concrete 100' long x 26' wide bridge will be entirely removed using NCDOT guidelines for bridge removal. There are 5 existing interior pile/bent structures that will be entirely removed. The new bridge will increase the horizontal floodway by extention to a 150' long x 30' wide bridge. The new bridge will consist of a 3 span concrete deck, supported by concrete girders, and bents. This bridge will be replaced along the existing alignment with a slight 4' shift to the south. Approximately, 1200 sq. ft. (0.03 acres) of approach fill will be removed and restored to adjacent wetland grade. There are 0.106 acres of permanent impacts to coastal wetlands on this project, resulting from minor roadway fill along the existing shoulders. The coastal wetlands are primarily located along the existing road shoulder and maintained corridor. Thi project will also require the installation of vertical abutment sheet pile, which will impact 22 linear feet of shoreline along Back Creek and the adjacent man-made canal. The 22 feet of sheet pile shoreline stabilization incases 54 sq. feet of permanent surface water impact. These impacts are detailed on the provided drawings and impact table. There is one utility line consisting of a fiber optic cable, which will be bored from the shoulder points along US 264. This will result in 54 sq. ft. of temporary hand clearing impact that will be allowed to revert back to vegetated statu following construction. Equipment used during this operation will include a crane, excavators, backhoes, dump trucks, and paving equimpment. 4. Jurisdictional Determinations 4a. Have jurisdictional wetland or stream determinations by the X Yes No Unknown Corps or State been requested or obtained for this property / project (including all prior phases) in the past? Comments: 4b. If the Corps made the jurisdictional determination, what type X Preliminary Final of determination was made? 4c. If yes, who delineated the jurisdictional areas? Agency/Consultant Company: Name (if known): Clay Willis 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. USACOE confirmed the delineated wetland line on 2/19/2014 5. Project History 5a. Have permits or certifications been requested or obtained for Yes X No Unknown this project (including all prior phases) in the past? pa e 3 of 10 PCN Form — Versfon 1.4 January 2009 5b. If yes, explain in detail according to "help file" instructions. 6. Future Project Plans 6a. Is this a phased project? Yes X No 6b. If yes, explain. Page 4 of 10 PCN Form — Version 1.4 January 2009 C. Proposed Impacts Inventory 1. Impacts Summary 1 a. Which sections were completed below for your project (check all that apply): X 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. Area Wetland impact Type of impact Type of wetland Forested Type of jurisdiction of number Corps (404,10) or impact Permanent (P) or DWQ (401, other) (acres) Tem orar T W1 Permanent Fill Coastal Wetland marsh Corps 404 0.106 W2 Temporary Hand Clearing Coastal Wetland marsh Corps 404 0.001 W3 W4 W5 W6 2g. Total Wetland Impacts: 0.107 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. NONE PROPOSED 3a. 3b. 3c. 3d. 3e. 3f. 3g. Stream impact Type of impact Stream name Perennial (PER) or Type of Average Impact number intermittent (INT)? jurisdiction stream length Permanent (P) or width (linear Temporary (T) (feet) feet) S1 S2 S3 S4 S5 S6 3h. Total stream and tributary impacts 3i. Comments: Page 5 of 10 PCN Form — Version 1.4 January 2009 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 individuall list all o en water im acts below. 4a. 4b. 4c. 4d. 4e. Open water Name of waterbody impact number (if applicable Type of impact Waterbody Area of impact (acres) Permanent (P) or type Temporary (T) 01 Permanent Deep Creek/ Canal Fill warm 0.001 acres 02 03 04 4f. Total open water impacts 0.001 acres 4g. Comments: 5. Pond or Lake Construction If pond or lake construction proposed, then complete the chart below. NONE PROPOSED 5a. 5b. 5c. 5d. 5e. Pond ID number Proposed use or Wetland Impacts (acres) Stream Impacts (feet) Upland purpose of pond (acres) Flooded Filled Excavated Flooded Filled Excavated P1 P2 5f. Total: 5g. Comments: 5h. Is a dam high hazard permit required? Yes No If yes, permit ID no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: 6. Buffer Impacts (for DWQ) No Buffer Impacts in project area If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts below. If any impacts require mitigation, then you MUST fill out Section D of this form. 6a. Project is in which protected basin? Neuse Tar-Pamlico Catawba Randleman Other: 6b. 6c. 6d. 6e. 6f. 6g. Buffer Impact Reason for impact Stream name Buffer Zone 1 Zone 2 number — mitigation impact impact Permanent (P) or required? (square (square Temporary (T) feet) feet) B1 B2 B3 B4 B5 B6 6h. Total Buffer Impacts: 6i. Comments: Page 5 of 10 D. Impact Justification and Mitigation 1. Avoidance and Minimization 1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. Avoidance Minimization efforts have resulted in vertical sheet pile road shoulder retaining walls, which reduced the extent of the road shoulder width. All road shoulders are set at a 2:1 slope. The new bridge is 50' longer than the existing, which will open up the opportunity to restore 1200 sq. feet of coastal floodplain adjacent to Deep Creek. The approach fill will be removed and graded to match adjacent wetland elevations. This will enhance the hydraulic flow regimes within this coastal marsh system and increase flooding of the coastal marsh on the west side of US 264. There is no deck drains located on the bridge and storm water outlets have been placed to maximize vegetated buffer treatment. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. The project is using top down construction techniques with staged construction to detour traffic on-site. The project will install erosion control measures and follow NC BMP for sediment and erosion control. Adjacent wetlands can be clearly marked to avoid any potential unintended disturbance. In-water work moratoriums will be followed to avoid impacts to fishery resources. 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 X 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 Payment to in-lieu fee program project? Permittee Responsible Mitigation 3. Complete if Using a Mitigation Bank NOT APPLICABLE 3a. Name of Mitigation Bank: Type: Quantity: 3b. Credits Purchased (attach receipt and letter) Type: Quantity: Type: Quantity: 3c. Comments: 4. Complete if Making a Payment to In-lieu Fee Program NOT APPLICABLE 4a. Approval letter from in-lieu fee program is attached. 4b. Stream mitigation requested: linear feet 4c. If using stream mitigation, stream temperature: 4d. Buffer mitigation requested (DWQ only): square feet 4e. Riparian wetland mitigation requested: acres 4f. Non-riparian wetland mitigation requested: acres 4g. Coastal (tidal) wetland mitigation requested: acres 4h. Comments: 5. Complete if Using a Permittee Responsible Mitigation Plan NOT APPLICABLE 5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan. Page 6 of 10 PCN Form — Version 1.4 January 2009 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 Yes X No buffer mitigation? 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. 6c. 6d. 6e. Zone Reason for impact Total impact Multiplier Required mitigation (square feet) (square feet) Zone 1 3(2 for Catawba) Zone 2 1.5 6f. Total buffer mitigation required: 6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank, permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund). 6h. Comments: Page 7 of 10 E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan 1 a. Does the project include or is it adjacent to protected riparian X Yes No buffers identified within one of the NC Riparian Buffer Protection 1 b. If yes, then is a diffuse flow plan included? If no, explain why. The project is bordered by coastal marsh on all quadrants, therefore the Yes X No buffer areas are located beyond the project limits 2. Stormwater Management Plan 2a. What is the overall percent imperviousness of this project? NA 2b. Does this project require a Stormwater Management Plan? X 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: NCDOT will use Best Management Practices for soil and erosion control. We will have an erosion control plan for the work site, which will install silt fence and various other erosion control devices. Those devices will be monitored and maintained by our roadside environmental staff. Rainfall records will be monitored and recorded. NCDOT will follow the NPDES permit issued to th state for highway construction 2e. Who will be responsible for the review of the Stormwater Management NCDWQ Plan? 3. Certified Local Government Stormwater Review NA 3a. In which local governmenYsjurisdiction is this project? Dare County Phase II NSW USMP 3b. Which of the following locally-implemented stormwater Water Supply Watershed management programs apply (check all that apply): NA Other: 3c. Has the approved Stormwater Management Plan with proof of Yes X No approval been attached? 4. DWQ Stormwater Program Review X Coastal counties X HQW 4a. Which of the following state-implemented stormwater management ORW programs apply Session Law 2006-246 (check all that apply): Other: 4b. Has the approved Stormwater Management Plan with proof of X Yes No a roval been attached? 5. DWQ 401 Unit Stormwater Review 5a. Does the Stormwater Management Plan meet the appropriate Yes No re uirements? NA 5b. Have all of the 401 Unit submittal requirements been met? NA Yes No Page 8 of 10 PCN Form — Version 1.4 January 2009 F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project involve an expenditure of public (federal/state/local) funds or the X 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 X No (North Carolina) Environmental PolicyAct (NEPA/SEPA)? 1 c. If you answered "yes" to the above, has the document review been finalized by the State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval letter.) Yes X No Comments: Not required 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 X No or Riparian Buffer Rules (15A NCAC 2B .0200)? 2b. Is this an after-the-fact permit application? Yes X 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 X 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. No wastewater will result from the proposed fill activities associated with this permit application. Page 9 of 10 PCN Form — Version 1.4 January 2009 5. Endangered Species and Designated Critical Habitat (Corps Requirement) 5a. Will this project occur in or near an area with federally protected species or X Yes No habitat? 5b. Have you checked with the USFWS concerning Endangered Species Act X Yes No i mpacts? 5c. If yes, indicate the USFWS Field Office you have contacted. Raleigh 5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? Review the project area habitat for listed species in Dare County and the NC Natural Heritage Database. 6. Essential Fish Habitat (Corps Requirement) 6a. Will this project occur in or near an area designated as essential fish habitat? Yes X No 6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat? NMFS Essential Fish Habitat resource list 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 X No status (e.g., National Historic Trust designation or properties significant in North Carolina history and archaeology)? 7b. What data sources did you use to determine whether your site would impact historic or archeological resources? NC State Historic Preservation Maps — Project was reviewed by NCDOT architectural history and archaeological staff 8. Flood Zone Designation (Corps Requirement) 8a. Will this project occur in a FEMA-designated 100-year floodplain? X Yes No 8b. If yes, explain how project meets FEMA requirements: The proposed fill will not impact the FEMA floodplain designation. The proposed work will follow bridge design requirements as defined by the fema flood zone requirements. 8c. What source(s) did you use to make the floodplain determination? NC Flood plain mapping program Applicant/Agent's Printed Name Applicant/Agent's Signature (agent�s Date signature is valid only if an authorization letter from the applicant is provided.) Page 10 of 10 ��� � �� ����� � ��� M���� � ��� � �,���� ���� �� SITE 4 R uNreo os a Pi �su�acn ABANDON EXISTING COPPER � AND FIBER CABLES �EEP LREEK RNER Tp LONG SN�A� "' ���Il���,l�llm�ll I�I�..�����Ilm �I���III'll — 61 LF SHEET PILE �IIP�;�� 113 Ilkllll"IYa"i"iV' �7Q.DIIIIIm11 wETLANDS DELINEATEO BY CLAY WILLIS DIVISION I ENVIRONMENTAL OFFICER F F F CPNAL � �.II..�4�4:b Il:i Il�bl�ll'��II'�i II'� �.�I�.���III...H'.:_� � EXIST R/W END OF SHEET PILE � DIRECTIONAL BORE 825' AT A MINIMUM DEPTH OF 53' BELOW GRADE, 20' GL, TO .NOR PAROLE EVIDENCE AVOID VERTICAL SHEET PILING. PULL IN 825' OF 4" PIPE WITH 1-%25" SUBDUCT. PULL COPPER AND FIBER CABLES THRU. � DENOTES FILL IN WETLAND � DENOTES HAND CLEARING �DENOTES IMPACTS IN SURFACE WATER V SITE 5 BORE PIT, 17' L OF GL, STA 20+28 �—�" ,����� ������������ �IIIF������ F f _ _ � ��������������������������� ������������������„„�������—���������������m�������-����������-����������-����������-����������-����������-� — — ���- � — — ���r�e�����������������������������r — — — — — — — — — xie— — — — — — — — — — — — — —vi oa�uai — * �������a������ ioaruai—* ra Tra ����������������������������������� III ._ ._ . FT r M 53'�D'2n.TW --- TO ENGLEHARD — — — — f — — — —IILB — �— — — — — — — — — —IILB-1-- — — — c,wu PLOW COPPER & FIBER CABLES TO NEXT PED, 262 LF AT 18' L OF GL UNfED SfAiES OF WERRA pB i75 PG �3 •� • •• ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ � .� 17BP.1. R.50 DARE COUNTl ROADWAY DESIGN ENGINEER METHOD II MODIFIED CLEARING COASTAL WETLAND IMPACTS SURFACE WATER IMPACTS FILL IN WETLAND TEMP. IMPACTS TEMP. IMPACTS PERM. IMPACTS SITE 4 1870 SF 23 SF - - SITE 5 436 SF - - - SHEET NO. HYDR4ULIC ENGINEER L L L L L L PROPOSED LOWEST LOW STEEL = 1.72' — — — — — — — — — — — — — — — SHEET PILING 100 YEAR ELEV. = 0.04' 25 YEAR ELEV.=-O.1L 00 BI4iD�GE rn'DRAuu�C DATA QES�pIr arSd+A�iQE ■ 95f! aEs�ar f�avE�cr - so QES�dI► �+Mr E[EVAT�QM ■ QD e� asr�►,wr� ■ �ao wr.� e�SE f�E�NL'r ■ rGD BASE MI E[EVAT�(MV ■ QD/ aE�raw�c asa+� • �a aE�ra�c f�a��cr. sao� aE�ra�c Er.�vaar • u QATE GF SI�iVE�' M.SrELE'YATlqlll AT QATE OF S►�EY . ■ 9-Id-. .� CFS rRs fr Rs fr cFs rRs fr fr fr 15+00 CL STA. 16 + 06.16 -L-, EL. 4J0' SKEW = 75 DEGREES 1 @45', � @50�, � @5�", 21" CORED SLAB BRIDGE VERTICAL ABUTMENTS � - �� �� --�� -- i iis � ii ���\ ������� 16 00 EXIST. BRIDGE PROPOSED ROADWAY GRADE TO BE REMOVED �AT CENTERL/NE ���---------------- - EXISTING LOWEST LOW STEEL = 1.67' — SHEET PILING FEMA 100 YEAR COASTAL STILL WATER ELEVATION = 4.0' WSEL=-0.1' DATE: 9-28-11 (NWL) 17 00 10' w DIRECTIONAL BORE 825' AT A MINIMUM DEPTH OF Q 53' BELOW GRADE, 20' C/L, TO AVOID VERTICAL N SHEET PILING. PULL IN 825' OF 4' PIPE WITH I-I/25' SUBDUCT. PULL COPPER AND FIBER a CABLES THRU. v � 4 0' 0' 0' � W > HORIZONTAL SCALE 18 00 DIVI3I4N OF HIaHWAYS DARE C4UNTY PROJEC7': 270003 BRIDOE 47000.i US 26� OVER DEEP CREEK