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31604.DSK <br /> WP-SFO <br /> and cross-sections with material from the excavation. The finished <br /> subgrade shall be within a tolerance of plus or minus 0.08 of a foot of the <br /> grade and cross-section shown, and shall be smooth and free from <br /> ( irregularities and at the specified density. The subgrade shall be considered <br /> I to extend over the full width of the base course. Compaction shall extend <br /> 1 foot beyond the edge of paving, curb, or form. <br /> B. In advance of setting line and grade stakes, the subgrade area shall be <br /> cleared of brush, weeds, vegetation, grass, and debris, all of which shall be <br /> satisfactorily disposed of. All depressions or ruts which contain water shall <br /> be drained. The subgrade shall then be bladed and dragged to remove <br /> inequalities and secure a uniform surface. <br /> C. The Contractor shall be responsible for the protection of existing <br /> improvements and any damage resulting from operations shall be the <br /> Contractor's sole responsibility. <br /> 3.2 EXCAVATION BELOWGRADE <br /> A. Where the Engineer deems subgrade material to be unsatisfactory, <br /> excavation belowgrade will be required to such depths as necessary to <br /> remove the unsatisfactory material. Excavation belowgrade shall be of the <br /> same classification as that above it, provided it is removed in the same <br /> operation as the normal excavation. Where the Contractor has completed <br /> the excavation and is required to move back to remove unsuitable material, <br /> or where the additional depth requires special equipment because of the <br /> presence of shallow utilities or other unforeseen conditions, the work shall <br /> be performed and a payment for excavation belowgrade will be made on the <br /> basis of extra work as provided in the Contract. <br /> B. If the excavation belowgrade is required because of negligence on the part <br /> of the Contractor, the necessary excavation belowgrade and the backfilling <br /> required to restore the surface satisfactorily shall be at the Contractor's sole <br /> expense. <br /> C. The subgrade shall be sprinkled with water, as required, and in such <br /> f quantities as necessary to obtain the specified compaction. <br /> 3.3 PROTECTION OF SUBGRADE <br /> A. After preparing the subgrade as above specified, all unnecessary traffic <br /> shall be kept off. <br /> B. The subgrade shall be maintained in the finished condition until the first <br /> succeeding course is placed. <br /> END OF SECTION <br /> 4 <br /> BAE31604.AS.T1 <br /> 02215 2 PREPARATION OF SUBGRADE <br />