2007-136 - Laserfiche WebLink

Home Browse Search

bottom of the cutterhead, drag arms, dustpan, or clamshell shall be reported on the first Contractor' s Daily Quality Control Report. 28 . 1 Work Areas and Exclusion Areas . The Plans identify a Deepwater Access Corridor to the Borrow Area to be used for all equipment moving into or out of the area. The Plans specify a work area where spudding and anchoring are permitted and exclusion areas which are not to be used for transit, anchoring, dredging or any other vessel activity. Pipeline routes are discussed in Section 29.2 of these Specifications. 29 . TRANSPORT OF EXCAVATED MATERIALS 29. 1 Methods of Transport. The method of transporting the fill from the borrow area to the placement area shall be proposed by the CONTRACTOR at the time of the bid. The method of transport shall be the CONTRACTOR' S decision, however, the method must comply with all permits, production volume requirements, and environmental specifications . Trucking fill on the beach shall be allowed if fill placed above mean high water is compacted mechanically with methods approved by the COUNTY, or if the CONTRACTOR places an additional 10% of the quantity specified by the construction template at no additional cost to the COUNTY to compensate for the loosely packed sand ("fluff') that results from dry placement. Upland sand source bidders must submit documentation that the proposed sand source meets the mean grain size, percent fines, and other characteristics of the offshore borrow material identified in these documents. 29. 2 Pipeline Method. All pipelines shall be submerged except at the dredge, mono-buoy, and/or boosters. The CONTRACTOR shall propose location(s) of the submerged pipeline that must be approved by the COUNTY prior to submerging the pipeline. The CONTRACTOR shall avoid hardbottom or reef locations in the proposed pipeline route and shall provide a plan view drawing clearly indicating the route relative to the known locations of reeflhardbottom and the Work and Exclusion Areas specified in the Plans. The CONTRACTOR shall be required to place collars on the pipeline in the locations where pipeline contact with the hardbottom is possible. The COUNTY shall provide the CONTRACTOR a map of the hardbottom located in the vicinity of the placement area landward of the —20 ft NGVD contour prior to CONTRACTOR-proposed designated pipeline access corridor route(s) . Subsequent to submerging of the pipeline, the CONTRACTOR shall provide as-built drawings showing the actual position of the pipeline. The CONTRACTOR shall maintain a tight discharge pipeline at all times. The joints shall be constructed to preclude spillage and leakage. Leaks shall be promptly repaired and the dredge shall be shut down until complete repair has been made to the satisfaction of the COUNTY. The CONTRACTOR shall transport the COUNTY to the leak repair site for visual inspection if so requested by the COUNTY . 29.3 Hopper Dredge Method. If the material is transported by hopper dredge or scows, then all scows and vessels must be kept in good condition, the coamings repaired and the pockets provided with proper doors or appliances to prevent leakage of material. Overflow at the TECHNICAL AND ENVIRONMENTAL SPECIFICATIONS11 1 -27