Laserfiche WebLink
Newmont-Cripple Creek&Victor Gold Mine . <br /> Technical Specification No.02200.DOCX <br /> Squaw Gulch VLF ■ <br /> Project No.475.0106.006 <br /> June 15,2016 <br /> E. The CONTRACTOR will be responsible for the safety of temporary construction slopes. <br /> CONTRACTOR shall inspect all temporary and permanent open-cut excavations on a <br /> regular basis for signs of instability. Should signs of instability be noted, CONTRACTOR <br /> shall immediately undertake remedial measures and shall notify MANAGER <br /> immediately. Permanent cut slopes shall be left in smooth, safe, and stable condition at <br /> the end of the workday. <br /> F. CONTRACTOR shall final grade excavations within the valley leach facility to establish <br /> positive drainage to the Pregnant Solution Storage Area. In no case will depressions or <br /> bowls be permitted in the valley leach facility area. <br /> G. CONTRACTOR shall conduct all excavation and shoring operations in compliance with <br /> applicable MSHA, Colorado State and Federal government laws and regulations. <br /> 3.5. Subgrade <br /> A. The MANAGER and CERTIFYING ENGINEER will inspect and approve the exposed <br /> subgrade prior to any fill or Soil Liner being placed. CQA Monitor will confirm that the <br /> surface of the subgrade is smooth and free of debris, grade stakes, angular rocks, roots, <br /> branches, vegetation, mud, ice, or frozen material. If the subgrade is determined to be <br /> frozen, using the criteria identified in Item 3.06.10 of Section 2200, the CONTRACTOR <br /> may either remove and replace the frozen subgrade or wait until subsequent <br /> temperature monitoring indicates the fill is unfrozen, at no cost to CC&V. The subgrade <br /> shall have no sudden sharp or abrupt changes in grade. <br /> B. CONTRACTOR is responsible for maintaining subgrades in a condition satisfactory to <br /> CERTIFYING ENGINEER. CONTRACTOR shall protect prepared subgrades, including <br /> previously approved subgrade, from weather, construction equipment, or other factors <br /> as outlined in Part 3.06 of the SPECIFICATIONS. Subgrade surfaces, including previously <br /> approved subgrade, that become softened or otherwise unsuitable for placement of <br /> fill, shall be repaired to CERTIFYING ENGINEER's and MANAGER's satisfaction, at no <br /> cost to CC&V. <br /> C. Prior to placement of fill materials, CONTRACTOR shall scarify all in-situ materials to a <br /> depth of 6-inches, moisture condition, and recompact the subgrade. Compactive effort <br /> shall be adequate to obtain a minimum of 95 percent of maximum dry density as <br /> determined by the standard Proctor test (ASTM D698) for the particular fill material. <br /> Moisture conditioning shall be adequate to achieve a uniform moisture and density. In <br /> rock areas, the CONTRACTOR shall prepare the subgrade by removing loose rock <br /> fragments until competent foundation material is encountered as approved by <br /> CERTIFYING ENGINEER. <br /> D. If the underlying material is unsuitable to permit proper compaction of the subgrade, <br /> CONTRACTOR shall loosen, aerate (or excavate and remove), and recompact the <br /> subgrade until the top layer can be compacted as required. The recompacted surface <br /> Page 8 <br />