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Newmont-Cripple Creek&Victor Gold Mine <br /> Technical Specification No.02200 REV D <br /> Squaw Gulch VLF . <br /> Project No.475.0106.006 <br /> March 13,2020 <br /> 3. CONTRACTOR shall place Drain Cover Fill in a single 24-inch loose lift. The tracked <br /> equipment shall operate only over previously placed Drain Cover Fill. CONTRACTOR <br /> shall not operate equipment directly on geosynthetics. Only a dozer with a ground <br /> pressure not exceeding 8.7 psi can be used to place Drain Cover Fill.A CAT 12G motor <br /> grader, or equivalent approved by CERTIFYING ENGINEER, can be used for Drain <br /> Cover Fill final grading. Equipment used for placement will not be allowed to pivot <br /> on one track (i.e. no abrupt or sharp turns).There shall be no downhill placement on <br /> slopes steeper than 4H:1V. Material can be placed along contours if buttressed from <br /> below. Motor graders shall not be allowed to make abrupt turns, brake suddenly, or <br /> dig blade in which results in the tires spinning on the Drain Cover Fill surface. <br /> 4. Highway compatible Rubber tired construction equipment shall not be allowed to <br /> travel over the geomembrane or on top of Solution Collection piping unless a <br /> thickness of at least 45 inches of Drain Cover Fill has been placed over the <br /> geomembrane and on top of Solution Collection piping. The CONTRACTOR will be <br /> required to demonstrate to the MANAGER, DESIGN ENGINEER and CERTIFYING <br /> ENGINEER that the equipment and procedures used are not detrimental to the <br /> geomembrane and piping,at no cost to CC&V. Off road haul truck traffic shall require <br /> a minimum of 60 inches for Cat 773 (or equivalent) of Drain Cover Fill placed over the <br /> geomembrane and solution collection piping, and a minimum of 120 inches for CAT <br /> 777 (or equivalent) of Drain Cover Fill placed over the geomembrane and solution <br /> collection piping. <br /> S. When placing Drain Cover Fill the maximum acceptable drop height is 3 feet. <br /> 6. CONTRACTOR shall operate equipment in a manner that is protective of underlying <br /> geosynthetics. If MANAGER or CERTIFYING ENGINEER suspects the occurrence of <br /> any damage to the underlying geosynthetics, MANAGER will instruct CONTRACTOR <br /> to remove Drain Cover Fill to expose the geosynthetics. CONTRACTOR shall uncover, <br /> repair any observed damage of the underlying geosynthetics, in accordance with the <br /> repair requirements of Sections 02776.0 and 02777.0 of these SPECIFICATIONS, and <br /> recover, at no cost to CC&V. <br /> 7. CONTRACTOR shall place Drain Cover Fill at a rate such that the geomembrane liner <br /> is not exposed to ultraviolet light for more than 180 days. <br /> 8. CONTRACTOR shall provide close continuous monitoring at the point of placement <br /> during the placement of the Drain Cover Fill over geosynthetics. <br /> 9. CONTRACTOR shall verify the final thickness of Drain Cover Fill to determine <br /> compliance with this SPECIFICATION. CONTRACTOR shall record verification location, <br /> elevation, and thickness. CQA Monitor shall witness all verification measurements. <br /> CONTRACTOR will submit a method of verifying Drain Cover Fill depth to MANAGER <br /> for approval. Grade markers shall be placed on a 50-by-50-foot grid with additional <br /> points required for breaks in grade. CONTRACTOR shall remove all grade markers <br /> under supervision of CQA Monitor after verification measurements have been <br /> Page 18 <br />