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Home My WebLink About20230611 Ver 1_DMF Moratorium Relief Authorization_20230420From: Harrison, James A To: Doliber. Brian C Subject: Re: NC DOT Ferry Division Moratorium Relief Request- Pile Repair & Maintenance Spring -Summer 2023 Date: Thursday, April 6, 2023 9:55:07 AM Attachments: imaoe001.ono Outlook-oa2ili5d.ona Good morning Brian, Thank you for providing that detailed schedule of work to be done. Having that level of detail certainly makes the request much easier to review. Based on the scope of work to be completed, DMF is amenable to granting the requested relief. There are some recommendations, though, that will help minimize impacts to resources that may occur during this work. First, DMF would recommend that during piling removal, the pilings should be removed slowly and allow sediment to slough off the pilings. This will help to minimize increases in turbidity. Second, DMF would recommend that piling installation include a soft- start/ramp-up methodology, starting pile driving at a lower setting (i.e., below 50%) and gradually ramp up to the full capability. This results in sounds at lower levels at the start of piling installation, essentially serving as a warning to aquatic organisms in the area to avoid or leave the area. Third, every effort should be made to safely finish the proposed work ahead of the expected schedule, minimizing the work that occurs during the moratorium period. Finally, a turbidity curtain should be used when possible and practical. I fully understand that this may not be possible in all areas of the basin. But if there are any operations that can utilize a curtain, they should do so. If anything else is needed, feel free to reach out. Thanks Brian, and thank you for your continued coordination! Jimmy Jimmc� Harrison Hakitat and F_nkancement Section NC Division of Marine riskeries iames.karrison@ncdenngov 2.52.-9+8-5855 (office) 757-272-5250 (Mokile) "very pizza can be a personal pizza if �ou tr� kard enougk and believe in �ourself" Email correspondence to and from this address is subject to the North Carolina Public Records Law and may he disclosed to third parties. From: Doliber, Brian C <bcdoliber@ncdot.gov> Sent: Thursday, April 6, 2023 09:38 To: Harrison, James A <James.Harrison@ncdenr.gov> Subject: RE: NC DOT Ferry Division Moratorium Relief Request- Pile Repair & Maintenance Spring - Summer 2023 Good morning Jimmy, We ended up having engine issues with our SkyCo crane barge that altered our schedule but it has been completely overhauled and is being re -installed over the next couple of weeks. We should have our final schedule for this spring and summer set. We are requesting moratorium relief for the in - water pile work outlined below. No dredging is scheduled until Fall of 2023. • May 1-May 31: Hatteras piling repair & replace (location map attached) --- 59063 NC Hwy 12, Hatteras NC 27943 o A vibratory hammer will be utilized to remove and install all piles. However, if a pile is broken off beneath the surface, a clamshell bucket will be used to break it loose and pull it. This is the methodology that the Ferry Division has followed during all previous dolphin maintenance projects. • June 1-June 12: Ocracoke H-pile installation to support ramp & gantry (location map attached)--- 60 Pilot Town Circle, Ocracoke NC 27960 o The ramp and gantry system at the Ocracoke Silver Lake terminal is beginning to lean forward (waterward). In order to stabilize the ramp & gantry and prevent potential safety issues or damage an H pile would be installed on each side of both ramps, approximately 10' landward from the gantry/counterweights. The H-piles would be driven with a vibratory hammer and a cross beam would be welded from the H-piles to the gantry. • June 13-June 18: Fort Fisher navigation aid replacement (location map attached) --- 2422 s. Fort Fisher Blvd, Kure Beach NC o During a recent dredging event the HDPE pipe that transports dredging material to the spoil site became entangled with the piles during an ebb tide and snapped them off at the top. The navigation aids are located just outside of the ferry basin and exist to allow for safe navigation in and out of the basin. Temporary floating marine plastic balls have been installed until the piles can be replaced. All four existing piles are wood and will be replaced with wooden piles of the same width and length. The location of the piles will not change. A vibratory hammer, along with a clamshell bucket, will be utilized to remove and install all piles. • June 19-June 27: Southport dock piling modifications (location map attached) --- 1650 Ferry Road, Southport NC 28461 o The dock for the ferry tie-up slips was replaced in 2021 and was positioned slightly too far to the east. As a result, the furthest landward pile clusters do not adequately prevent the ferries from coming into contact with the dock. Ferry workers are able to tie off the boats in a way that prevents damage to the dock once they are in the slips but adjusting/modifying the pile clusters is the only way to truly resolve the issue. The current situation poses a risk for property damage and is also a safety concern with employees working the docks. For the northern tie-up slip we are proposing installation of 4 additional piles on the interior sides of the two landward pile clusters. The oak fenders would be removed from the clusters, 4 new piles would be driven, and then the cables and fenders would be reinstalled. For the southern tie-up slip only the southern, landward cluster would need modified. To help keep the gangway in the proper location the northern cluster would remain as is. All piles from the southern cluster would be removed and then reinstalled four feet to the north so the spacing between the two clusters would be the proper width to stop the ferries from hitting the dock. A vibratory hammer, along with a clamshell bucket, will be utilized to remove and install all piles. • June 28-August 19: Southdock piling repair & replace (location map attached) --- 1380 Irvin Garrish Highway, Ocracoke NC o A vibratory hammer will be utilized to remove and install all piles. However, if a pile is broken off beneath the surface, a clamshell bucket will be used to break it loose and pull it. This is the methodology that the Ferry Division has followed during all previous dolphin maintenance projects. If you need any additional information or have any questions let me know. Thank you, Brian Doliber Environmental Program Supervisor/Facility Maintenance Coordinator Ferry Division 252 232 8025 mobile 252 621 6251 office bcdoliberCc)ncdot.gov 159 Lucinda Lane Powells Point, NC 27966 y3AFE - Q`,1 apw va 'tiwu� From: Doliber, Brian C Sent: Thursday, February 23, 2023 3:43 PM To: Harrison, James A <James.Harrison@ncdenr.gov> Subject: NC DOT Ferry Division Moratorium Relief Request- Pile Repair & Maintenance Spring - Summer 2023 Good afternoon Jimmy, The NC DOT Ferry Division is requesting moratorium relief to perform pile repair and maintenance at the Hatteras, Southdock (north end of Ocracoke), and Ocracoke Silver Lake (south end of Ocracoke) Ferry Terminals from April 1-August 31 2023. We had planned on dredging the Southdock basin this spring but postponed it to Fall 23 to stay outside of the moratorium and because some of our pile clusters are in such poor shape that ferries have incurred damage significant enough to take them out of service. I provided a brief description of the work to take place at each location and attached location maps for each terminal. The work will not take the entirety of the requested relief but because other types of critical issues pop up frequently I wanted the window to be lengthy enough to account for those unforeseen circumstances. All pile work would take place within the ferry basins and all of the work at Hatteras and Southdock would take place within the footprint of existing piles. Hatteras- 50 working days: Perform repair and maintenance on existing pile clusters. Some clusters would be completely removed and replaced in kind and other would only have the damaged piles removed and replaced in kind. Ocracoke- 15 working days: The 2 ramp and gantries at Ocracoke are starting to tilt forward and need to be stabilized. The piles (2 at each ramp) would be installed behind the gantry in the water and a steel beam would be welded to the gantry and pile to stabilize it. Southdock- 45 working days: Perform repair and maintenance on existing pile clusters. Some clusters would be completely removed and replaced in kind and other would only have the damaged piles removed and replaced in kind. A vibratory hammer, along with a clamshell bucket, will be utilized to remove and install the piles. If you need any additional information to make your determination just let me know and I will be happy to provide it. Thank you, Brian Doliber Environmental Program Supervisor/Facility Maintenance Coordinator Ferry Division 252 232 8025 mobile 252 621 6251 office bcdoliberCa)ncdot.gov 159 Lucinda Lane Powells Point, NC 27966 Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.