2025-01-27_REVISION - M1980244 (4)

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Newmont‐Cripple Creek & Victor Gold Mine Technical Specification No. 02200 EARTHWORKS VLF2 Phase 3 Project No.475.0106.049 August 27, 2021 Technical Specification No. 02200 Earthworks Page 10 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, 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 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. Six (6) measurements will be taken per acre, and if the average is below thirty‐two degrees Fahrenheit (32°F), 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. 11. Overburden slopes shall be compacted using a method specification and graded to meet the grades and dimensions shown on the DRAWINGS. The Bedding Fill subgrade surface will be prepared as identified in Section 2200 of the SPECIFICATIONS. B. Overburden Fill 1. Areas to receive Overburden Fill will include, but are not limited to, backfilling existing pits to within 35 feet of the proposed geomembrane surface. 2. Overburden Fill material shall be overburden waste placed with in maximum 25‐foot thick lifts, and compacted utilizing loaded haulage equipment. 3. Maximum rock size for overburden fill shall be 5 feet. 4. Prior to commencement of Overburden Fill, the CONTRACTOR shall complete task training to ensure that material meeting the specification is borrowed and placed. This training will include visually identifying oversized material and visually verifying that the material being loaded and placed is reasonably graded to avoid placement of gap graded material with excessive voids.