Approved Access Dredging Plan
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800,000 cys of required and allowable overdepth. The minimum production rate required to complete operations within thi s time frame is 8,695 cys per day. This production rate will be achieved by committing two dredges at the site during the duration of the job. The two dredges combined are capable of producing over 1,200 cys per run hour. Committing two dredges to the project will assure redundancy and allow for anticipated inefficiencies in the dredging cycle, while effectively compl eting the project within the allowed ti me frame. This work will be conducted in a manner that the free navigation of the waterway is not unreasonabl y interfered with and the present navigational depths are not impaired. Timely notice of any and all events that may affect nav igation shall be given to the District Commander during the performance of the work. Dredging methods will be employed to ensure that there is no increase in sedimentation and turbidity ou tside of the 500 ft mixing zone during the work . At all times during performance of the work a copy of the USACE Permit will be kept upon all vessels engaged in dredging and transporting the dredged materials. At all times during the performance of the work reasonable accommodations will be made to transport NMFS certified observers to and from both dredges to ensure that observer coverage is sufficient for 100% monitoring of dredging operations. Weeks Marine, Inc. understands that the monitoring coverage must involve the placement of a NMFS approved observer on board the dredge for every day that dredging is occurring. Prior to the start of the work the NMFS approved observer liaison will be provided with a 2417 point of contact associated with the dredging operation. Transport to the dredges will be coordinated through that point of contact. Once aboard the dredges an area will be dedicated to allow the observers to safely view the bucket operations in a manner that does not impede normal production rates. In addition to accommodations made for transport to the dredges, Weeks Marine, Inc. will make available all information and contacts for the NMFS cel1ifi ed observers to be present during di sposal operati ons. Coordinati on will occur in accordance with the TZC Dredging and Pile Driving Monitoring Plan. Condition 21 This Pelmit authorizes no upland handling, transferring, storage, di sposing or pl ac ing of dredged materi als in New York State; any such acti vity will require approvals from the Department before dredging begins. All material that is dredged from the site will be directly placed into sealed scows and shipped via tug to a permitted processing and or re-handling facility. Page 3 of 33 At the Don Jon site the offloading will occur at both the processing site described above and the offl oading si te incl uded below. The processed dredge material will either be pl aced into a stockpil e and then into tri -axle trucks or loaded directl y into tri-axle trucks for transport to the designated approved upland sites described fu rth er in this section. Prior to exiting the facilities, each truck will have its tires and body washed down . This will prevent tracking of material onto public roadways. Each truck will receive a bill of lading. This bill of lading will be utilized at the landfill to record each truck received and its pl acement locati on site. Material that is in-barge processed at the Weeks Marine, Inc. facility will be transported by tug to a temporary mooring and off-loading area in the Arthur Kill Ri ver immed iately adj acent to the DuPont-Grasselli site. At the temporary mooring a stevedoring crane will unload the processed materi al from the barges and place it directly on the DuPont - Grasselli property. Best Management Practices during the off-loading of the processed dredge materi al onto the Grasselli site will include controlling the swing rate of the off-loading crane and using spill pl ates as necessary to prevent discharge into the waterway during off-loading. Material off-loaded at the Grasselli site will remain there for beneficial use placement. The following sites are proposed to be utili zed as off-loading sites of In-barge processed dredge materi al onl y: DuPont - Grasselli Point Location Temporary Offloading and Transfer Facility Grasselli Point Road Linden, NJ (Weeks Marine, Inc. in-barge processed materi al) SIMS Metal Management NE Offloading and Transfer Facility Berth 30 Port Newark, NJ (Don Jon Marine, Inc. in-barge processed materi al) Upland Placement & Disposition Sites: Materi al processed at the Clean Earth Dredging Technologies, Inc. sites and the Don Jon Marine, Inc. site will be hauled by tri -axle truck to the sites li sted below. Prior to ex iting the processing facilities, each truck will have its tires and body washed down. Thi s will prevent tracking of materi al onto public roadways. Each truck will receive a bill of lading. This bill of lading will be utilized at the landfill to record each truck received and its pl acement location site. Page 5 of 33 Prior to exiting the upland placement area each truck will have its tires and body washed down to prevent tracking material onto public roadways. The processed dredge material is proposed for upland disposal or beneficial use at multiple sites in New Jersey and Pennsylvania. These sites are as follows: DuPont - Grasselli Beneficial Use Site South Wood Avenue Linden, NJ 07036 Koppers Seaboard Site I Fish House Road Kearny, NJ 07032 AHA Meadowlands Landfill Closure Site Lyndhurst, NJ Rutherford, NJ Bellmawr Waterfront Development Site 204 Harding A venue Bellmawr, NJ 0803! 269 Canal Road L. P. 269 Canal Road Fairless Hills, PA 19067 Bethlehem Earth, L.P. Site Bethlehem Steel Slag Processing Area Bethlehem, PA Coplay Aggregates Quarry Reclamation Project West Coplay Road Coplay, PA Former National Lead Site Sayrevil)e Seaport Associates, L.P. ("SSA") Sayrevi Ite, NJ Fenimore Landfill Site Adjacent to Mountain Road Roxbury Township, NJ All of the facilities and sites listed above are incl uded in the Acceptable Use Determination (AUD) application submitted to NJDEP on June 30, 2013 for the offloading, processing and disposal of dredged materia! from the New Tappan Zee Bridge Project, Tarrytown, NY. Page 6 of 33 Condition 22 Barge Overflow is prohibited. Weeks Marine, Ln c. understands that barge overflow is prohibited. All operators and crew members wi ll be instructed of thi s prior to the start of dredging operations. No barge overfl ow will be allowed during any part of the dredging cycle. All loaded scows will be shipped with adequate freeboard for the conditions at the time of shipment to allow for no barge overflow. Condition 23 Dredging must be conducted using a closed clamshell dredge, Drawings and specifications of the closed clamshell bucket and other dredging equipment, including specifications demonstrating that appropriate design considerations are incorporated in the equipment, must be provided to the Depattment at least 45 days before dredging related activi ties statl . Weeks Marine, Inc. will be utili zing the Cable Arm, Ln c. closed clamshell buckets contained in Appendix C of this Document. These closed clamshell buckets have a sealing system that minimizes the loss of materi al during transport through the water column. Any excessive loss of water from the buckets during the duration of the Project wi ll be in vestigated and repaired. Condition 24 The bucket must be lifted in a continuous motion through the water column and into the barge. Bucket decanting and loss of dredged material into the Ri ver during barge loading will be minimized to the maximum extent practi cable. Weeks Marine, Ln c. will employ experienced operators that wi ll have sufficient control over bucket depth, bucket closure, and bucket hoist speed during the duration of the work . Any malfunction of these controls wi ll be reported immediately and corrected. Condition 25 Dredgi ng equipment must be operated in a manner that minimizes the re-suspension of sediments in the Hudson Ri ver. Dredging operations may not cause turbidity that results in a substantial visible contrast to the Hudson River outside of the 500 ft mixing zone as set fo rth in the Water Quality Monitoring Section of the Permit. The cl osed clamshell buckets contained in Appendi x B reduce the amount of suspended solids in the upper water column at the dredging location. The movement of the spuds on the dredge wi ll be controlled in a fashion that wi ll minimize turbidity. Page 7 of 33 The dredges will be equipped with the maximum sized buckets that can be installed on each. This will minimize the amount of suspended solids di spersed during dredging operations by reducing the number of "bites' needed to dredge at each particular site. Turbidity monitoring wi ll be conducted as stated in the Water Quality Monitoring Plan. Results of the monitoring wi ll be communicated to the dredge superintendent and adjustments or controls will be put into place if turbidity approaches permit condition requirements. Condition 26 Best management practices include lowering the bucket to the level of the barge gunwales prior to release of the load and placing the dredged material in the barge in a controlled manner. Excessive loss of material from the bucket should be investigated and repaired. Bucket retrieval rates will be controlled to minimize turbidity. Prior to starting the work all dredge operators will be instructed of best management practices (BMP's) which include lowering the bucket to the level of the barge combing prior to releasing the load and placing the dredge material in the barge in a controlled manner.