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4 LINES AND GRADES <br />4.1 The Owner shall provide access and coordinate information for the <br />benchmarks of the established coordinate grid as reference points which in <br />his judgment are necessary to enable the Contractor to proceed with the <br />work. <br />4.2 Contractor shall be responsible for laying out the work and for slope grade <br />control. <br />4.3 The Engineer reserves the right to verity correctness of the layout of the <br />work and slope grades during the progress of the work. <br />4.4 The Contractor will preserve and maintain all bench marks and reference <br />points established by the Engineer or Owner, and shall not make changes <br />or relocations without the prior written approval of the Engineer or Owner. <br />Where bench marks and references will unavoidably be destroyed by the <br />construction, Contractor shall establish temporary or secondary reference <br />points outside of the construction area before the bench marks are <br />demolished, and shall protect and maintain such temporary points during <br />construction. <br />SPEC. A -EARTHWORK <br />PAGE 4 <br />