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Newmont-Cripple Creek&Victor Gold Mine ■ <br /> Technical Specification No.02200-Earthworks ■ <br /> Concentrate Shipping <br /> Project No.475.0106.015 <br /> June 2,2017 <br /> B. CONTRACTOR shall prevent the disturbance of surrounding areas during excavation. <br /> Where selective excavations are required to obtain materials for Select Structural Fill, <br /> the material removed from the excavations shall be taken directly to the fill areas or, if <br /> required, stockpiled by material types. The stockpiles shall be approved by the OWNER. <br /> C. CONTRACTOR shall grade all excavations to ensure grades are maintained to provide <br /> adequate drainage at all times. Work shall be suspended by CONTRACTOR when, in the <br /> opinion of the OWNER and CERTIFYING ENGINEER, the site is overly wet, muddy, or <br /> otherwise unsuitable for proper maintenance, until directed otherwise by the OWNER, <br /> at no cost to CC&V. <br /> D. In excavations where Select Structural Fill is to be placed on slopes steeper than 3H:1V, <br /> horizontal benches shall be excavated into the slope to allow fill to be placed in <br /> horizontal lifts. The CONTRACTOR shall continuously bench and key embankment <br /> material into the existing material a minimum of 2 feet horizontally. <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 OWNER immediately. <br /> Permanent cut slopes shall be left in smooth, safe, and stable condition at the end of <br /> the workday. <br /> F. CONTRACTOR shall conduct all excavation and shoring operations in compliance with <br /> applicable MSHA, Colorado State and Federal government laws and regulations. <br /> 3.3. Subgrade <br /> A. The OWNER and CERTIFYING ENGINEER will inspect and approve the exposed Subgrade <br /> prior to any fill being placed. CQA Monitor will confirm that the surface of the Subgrade <br /> is smooth and free of debris, grade stakes, angular rocks, roots, branches, vegetation, <br /> mud, ice, frozen material or otherwise unsuitable material defined by the <br /> SPECIFICATION. If the subgrade is determined to be frozen, using the criteria identified <br /> in Part 3.4.10, the CONTRACTOR may either remove and replace the frozen Subgrade or <br /> wait until subsequent temperature monitoring indicates the fill is unfrozen, at no cost <br /> to CC&V. The subgrade shall have no sudden sharp or abrupt changes in grade. <br /> B. CONTRACTOR is responsible for maintaining subgrades in a condition satisfactory to <br /> the CERTIFYING ENGINEER. The CONTRACTOR shall protect prepared subgrades, <br /> including previously approved subgrade, from weather, construction equipment, or <br /> other factors as outlined in Part 3.4 of this SPECIFICATION. Subgrade surfaces, including <br /> previously approved subgrade, that become softened or otherwise unsuitable for <br /> placement of fill, shall be repaired to the satisfaction of the CERTIFYING ENGINEER and <br /> OWNER , at no cost to CC&V. <br /> Page 3 <br />