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Home My WebLink About20111003 Ver 1_Meeting Minutes_20101020W� � t STATE OF NORTH CAROLINA DEPARTMENT OF TRANSPORTATION BEVERLY EAVES PERDUE GOVERNOR EUGENE A CONTI JR SECRETARY FINAL Minutes of the Interagency Hydraulic Design Review "4C" Meeting October 20, 2010 R 3307 State Protect 34528 1 1 US 70 From Existing Four Lanes at Radio Island to US 70 North of SR 1429 (Olga Road) Carteret County Team Members Tom Steffens Gary Jordan Travis Wilson Steve Sollod Stephen Lane Ron Sechler David Wainwright Chris Militscher Ron Lucas Ron Sechler David Harris Charles Cox Brenda Moore Lonnie Brooks Chris Rivenbark Ed Eatmon Participants (See attached list) USACE (present) USFWS (not present) NCWRC (present) NCDCM (present) NCDCM (present) NCMS (not present) NCDWQ (present) EPA (not present) FHWA (not present) NMFS (not present) Roadside Environmental Unit (not present but represented by Mark Staley) PDEA (not present but represented by Kristine O Connor) Roadway Design Unit (not present but represented By Katrina Washington) Structures (present) NEU (present) Division 2 (present) Plan Sheet 5 Tom Steffens asked if anyone knew where barges if used might tie up Jay believes the most logical place would be in the deeper water along the east shoreline adjacent to the former Maritime Museum property MAILING ADDRESS TELEPHONE 919 250 4100 LOCATION NC DEPARTMENT OF TRANSPORTATION FAX 919 250 4108 CENTURY CENTER COMPLEX HYDRAULICS UNIT BUILDING B 1590 MAIL SERVICE CENTER WEBSITE WWW NCDOT ORGIDOHI 1020 BIRCH RIDGE DRIVE RALEIGH NC 27699 1590 RALEIGH NC R 3307 4C Meeting October 20 2010 Page 2 of 7 The work bridge as shown on the permit drawings was set with a top elevation equal to the top of the pile caps The pile caps were estimated to be six feet tall with the base set one foot above Mean High Water The work bridge has an estimated depth of three feet and the estimated clearance between the bottom of the work bridge and Mean High Water is four feet If the elevations differ greatly Stephen Lane asked to be contacted It was noted that the navigational channel will not be crossed by the work bridge A question was raised about the excavation under the western end of the Gallants Channel bridge The excavation is required to both build the bridge and to provide inspection and maintenance access for post construction The area will be excavated to provide four feet of vertical clearance under the bridge Also another question concerned the treatment for the spill through slope The slope will be protected by Class II rip rap Jay Twisdale reviewed the scheme for treating the deck runoff Spans 1 2 will be conveyed in the shoulders to a grass swale for treatment Spans 3 8 will be conveyed by an enclosed drainage system to a grass swale Spans 9 — Crest (Span 17) will be conveyed by an enclosed drainage system to the infiltration basin near the western end of the bridge Crest — Eastern end of bridge will be conveyed via an enclosed drainage system to a filtration basin located under span 28 Steve Sollod requested NCDOT investigate the possibility of reducing impacts to CAMA wetlands and mentioned reinforced slopes were used at Davis Canal for the R 2245 Second Bridge to Oak Island project Jay said NCDOT will look into the options Lonme Brooks of SDU mentioned that maintenance of these steep embankments is very difficult Plan Sheet 6 No questions Plan Sheet 7 Linda Johns explained the design of the filtration basin that will be located under the bridge The design follows the design used for the filtration basin used for the Sunset Beach Bridge replacement project Plan Sheet 8 Jay explained the impacts at the southern end of the 48 RCP cross pipe Mark Staley noted the text stated Hand Clearing while the symbology showed Mechanized Clearing The correct clearing method is Hand Clearing and the symbology will be changed to Hand Clearing Travis Wilson discussed the need to maintain access to the WRC boat ramp and notification if temporary closures were necessary Ed Eatmon stated Traffic Control will have to accommodate the boat ramp and develop plans to keep it open during construction Travis asked for a copy of the traffic control plans when they become available Tom Steffens asked about the grass swale located in the old roadway bed (approx —L Sta 64 +90 Lt) and if the bottom of the swale would clear the top of the 18 RCP cross pipe Jay told hum it would R 3307 4C Meeting October 20 2010 Page 3 of 7 The existing gravel driveway access road to the former Maritime Museum property will be retained and used for access to the proposed filtration basin Plan Sheet 9 Discussion started with the location of the lift station near the northwestern end of the Turner Street bridge Current plans don t appear to fully locate the station Roadway will ask for additional surveys to pick up this utility Steve Sollod said the replacement station will need to be built at least 30 back from the mean high water line (MHW is +12 msl) NCDOT Utilities section will be made aware of this requirement Steve Lane volunteered to go out and mark the water line with Tyler Stanton Steve Sollod requested NCDOT investigate the possibility of reducing unpacts to CAMA wetlands on the right (west) side of Turner Street Jay said NCDOT will look into the options Jay discussed the 72 cross pipe and the fact that the old motel has been demolished and was planned to be replaced by a development called Mainsail While the motel no longer exists the Mamsad project has not progressed According to Stephen Lane and Tyler Stanton the Mainsail project has been permitted and the minimal amount of grading work they did under their permit filled in the CAMA wetland Tyler will revise the wetland file and delete the CAMA wetland at this site Tyler stated the jurisdictional stream still exists and our project will still cause impacts to this unnamed tributary NCDOT will obtain new surveys in areas such as the Mainsail project area and update the base mapping to reflect the changes Plan Sheet 10 A question was raised concerning the routing of pipes between —LREV Sta 89 +60 to 91 +50 The pipe running parallel to the —LREV alignment collects water from the roadway turns right and empties out into the ditch on the right side of the roadway The ditch drains back to the 24 cross pipe where it is conveyed to the base ditch on the left side of the roadway The crossing of the 15 and the 24 will not create a conflict due to the adequate vertical separation The large base ditch on the airport side of the project will replace the existing base ditch with a 1 for 1 exchange in nutigation This new base ditch will not be tabulated as a natural channel but only as relocation The JS line style for the large base ditch should end not at the base of the dam, but where the rip rap terminates downstream of the dam Tyler Stanton will work with Location and Surveys to correct the limits of the jurisdictional stream The wetland located at —LREV Sta 92 +00 is considered an isolated wetland and not a 404 wetland per Tyler Stanton Jay Tw>sdale explained the design concept for the equalizer pipe that conveys water around the I side of the detention basin Depending on tidal flow and wind influence the water will flow either way through the pipe dust as it does now in the open ditch it R 3307 4C Meeting October 20 2010 Page 4 of 7 Ed Eatmon said they should not affect the detention pond during construction Plan Sheet 16 Mechanized clearing will be used due to the moderate forest growth in this wetland The 48 equalizer pipes will be buried approximately 1 as stated in the 4B meeting even though it is not currently required NCDOT wants to bury the pipes to ensure the roadway fill doesn t back up water on adjacent properties Plan Sheet 17 There were no comments on this plan sheet Plan Sheets 20 (Turner Street) Discussions about the newly installed boardwalk centered on its removal Division Construction will plan on pulling all the piles and doesn t expect a problem doing so If they do have problems they will cut the piles below the mud line Team members don t believe the Town of Beaufort will install a new boardwalk upon completion of the roadway project due to several factors including that the bridge will have 5 5 sidewalks on both sides Steve Sollod requested NCDOT investigate reducing the unpacts to the CAMA wetlands located on the right side (west side) of —Y2 Turner Street David Wainwright noticed the grass swale data block for the swale at —Y2 Sta 24 +50 Rt did not include a length NCDOT will provide the information There were comments on treating deck stormwater runoff from the Turner Street Bridge Linda Johns explained the issues which included unsuitable soils for an infiltration basin additional impacts to wetlands if a grass swale with the necessary false cut (earthen berm) were installed and limited width of upland areas The current design uses a preformed scour hole (PSH) at the outlet of the storm system This PSH reduces the energy and promotes diffuse flow of the stormwater before it enters the adjacent CAMA wetland Agencies requested NCDOT provide sketches of the grass swale and expected impacts to the wetlands The Hydraulics Unit will coordinate with David Wainwright Steve Sollod and Stephen Lane Jay explained the impacts at the western end of the cross pipe near —Y2 Sta 24 +17 Rt Bank Stabilization will be used outside of the wetland boundary and hand clearing will be used at the end of the pipe out to the luiiits of the bank stabilization Tom Steffens asked about removal of the causeway to elevation of 0 2 and how that would tie back in to natural ground He was concerned about creating a drop off or ledge mainly where the plans show the transition ending abruptly at the Right of Way Byron Moore said they would blend in the transition and there would definitely not be a vertical drop off R 3307 4C Meeting October 20 2010 Page 5 of 7 General Comments 1 The current Let date is 17 JULY 2012 The Coast Guard s public comment time in reference to the bridge height closes on Friday November 12th The existing Grayden Paul bascule bridge will be demolished Discussion proceeded on the proposed bridge clearance of 65 Operators of boat maintenance yard at Jarrett Bay are asking for unluruted vertical clearance that a bascule bridge would allow However there are high voltage power Imes (110 000 volts) that cross the channel at a height of 88 Boats should maintain 10 of clearance between the top of their masts and the power Imes Also the FAA doesn t want a high bridge near the airport where it could impinge on the required clear zones DCM requested copies of data that NCDOT has concerning questions on the vertical clearance for the bridge Action Items Hydraulics Unit 1 Correct the symbology to show Hand Clearing and not Mechanized Clearing around the southern end of the 48 RCP on plan sheet 8 2 Add the length of swale to the swale data block plan sheet 20 Y2 Sta 24 +50 Rt 3 Provide sketches to DWQ and DCM showing a grass swale with false cut and the unpacts to the wetlands This swale would treat stormwater runoff from the Turner Street Bridge Roadway Design 1 Investigate the reduction of impacts to CAMA wetlands at a Plan Sheet 5 —L Sta 28 +00 — 29 +40 Lt b Plan Sheet 9 Y2 Sta 12 +40 — 13 +37 Rt c Plan Sheet 20 Y2 Sta 18 +75 — 22 +38 Rt 2 Coordinate with Traffic Control to provide and maintain access to the WRC boat ramp near Turner Street during construction and provide a copy of Traffic Control Plans to Travis Wilson 3 Request surveys for a The sanitary sewer lift station II b The Mainsail development on Parcel 9 c The timber boardwalk PDEA 1 Provide copies of data they have to DCM concerning questions on vertical clearance requirements and restrictions for the Gallants Channel Bridge NEU R 3307 4C Meeting October 20 2010 Page 6 of 7 Accompany Stephen Lane on survey of Mean High Water line in area of sanitary sewer lift station Revise the wetland file to delete the wetland at the end of the proposed 72 pipe on plan sheet 9 and revise the limits of the unnamed tributary jurisdictional stream Coordinate with Location Surveys to correct the location of the Jurisdictional Linestyle for the unnamed tributary that flows out of the airport s detention pond Track the classification of the isolated wetland on plan sheet 10 LREV Sta 92 +00 and notify all if the area is determined to not be a wetland Construction 1 Notify Stephen Lane if a work bridge is used that differs in dimensions and elevations as shown on the permit drawings No other comments were provided and the meeting was terminated R 3307 4C Meeting October 20 2010 Page 7 of 7 R 33" US 70 FROM EXiSrING FOJR LANES AT RADIO ISLAND TO US 70 NORTH OF SR 9429 CARTERET COUNTY MERGER PROCESS 4C MEETING WEDNESDAY 20 OCT 2010 Sign in Sheet NAME ORGANIZATION PHONE NUMBER EMAIL ADDRESS 91J7E7Fr- I 1��L �/v Zf� �(Gso 7,70 u /9 7�s��r.� Dri, AIJA 'n � /� �z� Ea 4'.3/-5:3 5 ,�.�� ,••fit � Iq 431 .4 v .$" 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