2017-06-09_REVISION - M1980244 - Laserfiche WebLink

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Newmont-Cripple Creek&Victor Gold Mine ■ Technical Specification No.02200-Earthworks ■ Concentrate Shipping Project No.475.0106.015 June 2,2017 content is reduced to an amount suitable for obtaining the specified degree of compaction, at no cost to CC&V. 9. After each layer of fill material has been placed, spread, and moisture-conditioned, the layer shall be compacted by passing compaction equipment over the entire surface of the layer a sufficient number of times to obtain the required density, as specified herein. Compaction shall be accomplished with equipment and by methods approved by CERTIFYING ENGINEER. If such equipment or methods are found unsatisfactory for the intended use, the CONTRACTOR shall replace the unsatisfactory equipment with other types or adjust methods until proper compaction is achieved. Prior to placement of a subsequent lift, the previous lift shall be thoroughly scarified to a nominal depth of 2-inches to provide good bonding between lifts. Scarification shall be accomplished by disking, raking with a grader, or an alternative method approved by the CERTIFYING ENGINEER. 10. The CQA Monitor will measure the ambient air temperature on an hourly basis. If the ambient air temperature is less than thirty-two degrees Fahrenheit for more than one hour over the preceding twenty-four (24) hours, the CQA Monitor will measure the temperature of the fill to determine if the fill is frozen. "Frozen" is defined as a mean temperature of thirty-two degrees Fahrenheit (32°F) or less. The CQA Monitor will measure the temperature at a depth of three (3) inches and six (6) inches, recording the lower of the two measurements. Six (6) measurements will be taken per acre, and if the average is below thirty-two degrees Fahrenheit (320F), the fill will be considered frozen. If the fill is determined to be frozen the CONTRACTOR may either remove and replace the frozen fill or wait until subsequent temperature monitoring indicates the fill is unfrozen at no cost to CC&V. B. Select Structural Fill 1. Select Structural Fill shall be placed for site grading as required by the OWNER and CERTIFYING ENGINEER. 2. CONTRACTOR shall condition Select Structural Fill to a moisture content that allows compaction to the required density and that results in a firm, unyielding surface capable of allowing the movement of vehicles and equipment over the surface without causing rutting or other deleterious effects. 3. CONTRACTOR shall place Select Structural Fill materials with less than 30 percent rock materials above 3/4-inch size in maximum 12-inch loose lifts, and compacted to 95 percent of maximum dry density and within 2% of the optimum moisture content as defined by ASTM D1557 (modified proctor). 4. CONTRACTOR shall condition and place Select Structural Fill containing more than 30 percent rock materials above 3/4-inch size (rock fill) in maximum 12-inch loose lifts and compact by a method compaction technique approved by the CERTIFYING Page 6