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29. 3 Hooper 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 borrow site during loading and during transport shall be permitted to the extent that turbidity and water quality standards are met and that overflow complies with all permit conditions. The CONTRACTOR shall prevent overflow during transit over, or 1 ,500 ft upeurrent of, hardbottom areas. 30. LAYOUT OF WORK FOR BEACH FILL PLACEMENT 30 . 1 Monuments. Only the survey monuments shown on the plans shall be used for surveying beach profiles for the measurement of beach fill quantities. 30.2 Layout. From the monuments, control data and elevations shown on the Contract Drawings, the CONTRACTOR shall complete the layout of the work and shall be responsible for all measurements that may be required for the execution of the layout of the work, subject to such modifications as the COUNTY may require to meet changed conditions or as a result of necessary modifications to the contract work. The layout of the work shall be based on the cross-sections and not the plan views in the Construction Plans. CONTRACTOR is responsible for verification of all horizontal and vertical control provided in the Contract Drawings. The majority of the control points provided in the Contract Drawings were established by others for the purposes of beach profile monitoring. CONTRACTOR must verify all horizontal and vertical control for all monuments within the project limits prior to construction . 30.3 Responsibility. The CONTRACTOR shall provide all stakes, templates, platforms, equipment, tools, materials, and labor at the CONTRACTOR's expense as may be required in laying out any part of the work from the monuments, control data and elevations established by the COUNTY. The COUNTY shall furnish all boundary surveys and establish base lines for locating the principal component parts of the work together with a suitable number of bench marks adjacent to the work as shown in the Contract Documents. From the information provided by the COUNTY, unless otherwise specified in the Contract Documents, the CONTRACTOR shall develop and make al] detail surveys needed for construction such as slope stakes, stakes for pipe locations and other working points, lines, and elevations. The CONTRACTOR shall be responsible for maintaining and preserving all monuments, stakes and other markers established by the COUNTY unless and until authorized to remove them. If such markers are destroyed by the CONTRACTOR or through the CONTRACTOR negligence, prior to their authorized removal, they may be replaced at the discretion of the COUNTY, and the expense of replacement shall be deducted from any amounts due or to become due the CONTRACTOR. 30 .4 Construction Stakes. All fill grade stakes shall be steel pipe approved by the COUNTY and shall be completely removed in their entirety immediately after final acceptance of the section. Stakes must be long enough to extend a minimum of 6 feet above finished grade without the use of mechanical joints. The CONTRACTOR shall TECHNICAL AND ENVIRONMENTAL SPECIFICATIONS ReN October 5 , 2007 TS-28