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R. Finding: DREDGE SPOILS DEPOSITION <br /> Dredge spoils will be deposited at approved dumping sites in <br /> Shoreline Management areas. <br /> Conclusion: The Navy is proposing the approval of a specific dredged <br /> material disposal site in conjunction with the Homeport Proposal. <br /> Detailed environmental analysis is contained in the EIS's listed in <br /> exhibits. A lease of bottomlands for the disposal of spoils has been <br /> authorized by the State of Washington legislation. <br /> The dredge spoils disposal site is in the process of being approved. <br /> This permit is part of the approval process. <br /> S. Finding: PIPELINE TRANSPORTATION OF DREDGE SPOILS <br /> Transportation of the "clean" or uncontaminated dredge spoils to the <br /> dredge disposal site will be by hydraulic pipeline. Materials would <br /> be discharged from a pipe with a diffuser to reduce the discharge <br /> velocity at the point of release from the pipe. This will allow the <br /> clean material to settle from the bottom outlet at its natural rate <br /> of fall to cap the contaminated material. <br /> Conclusion: The hydraulic pipeline used to slurry the clean dredged <br /> material will be approximately 9,000 feet long. It will be difficult <br /> to anchor and control. Occasional pipe separation and anchor <br /> movement will result in non-effective pumping time and potential <br /> displacement of sediments. Separation of a pipeline due to inclement <br /> weather is not expected to be a common occurrence, but it is expected <br /> that a discharge pipe separation would occur once a day. At that <br /> time, the change in discharge pressures would signal the leverman to <br /> lift the cutterhead and stop sediment pumping. This will take <br /> approximately two minutes, resulting in the discharge of about 70 <br /> cubic yards of "clean" dredged material. <br /> On water, the pipeline is supported by pontoons as a floating line <br /> and submerged where necessary for the convenience of navigation. It <br /> will be clearly marked with navigational aids to assist maritime and <br /> recreational boat traffic. <br /> T. Finding: SIGNS <br /> Signs shall be constructed to minimize visual obstructions of the <br /> shoreline and water bodies and when feasible signs shall be <br /> constructed against buildings. <br /> Conclusion: Signs identifying the Homeport will be a part of the <br /> gate facility and will not be standing separately. No signs are <br /> proposed which will present visual obstructions to the shoreline or <br /> Port Gardner Bay. <br /> U. Finding: ROADS - RELATIONSHIP TO TOPOGRAPHY <br /> Roads should be planned to fit the topography so that minimum <br /> alteration of natural conditions will be necessary. <br /> Conclusion: The road alterations will follow the existing route <br /> which follows natural contours and conditions. <br /> -15- <br />