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CIVIC CONTINENTAL MATERIALS CORPORATION <br /> Response: CIVIC proposes to use erosion control blankets to stabilize the topsoil. <br /> 35c.Tree planting:The response is not adequate. The response indicates tree watering is enhanced <br /> reclamation.The DRMS position is tree watering will significantly reduce the failure rate for planted <br /> trees. If watering is not to be part of the reclamation plan,the reclamation cost estimate should include <br /> a significant failure rate for trees, requiring replanting as much as 100 percent unless CIVIC has evidence <br /> the success rate in this area is higher without watering. Please confirm whether the DRMS should bond <br /> for 100%tree failure or supply the following: <br /> Response: CIVIC proposes to bond for 100%tree failure. <br /> i. What equipment is planned for watering the trees? <br /> Response: not applicable. <br /> ii. How much water is required? <br /> Response: not applicable. <br /> iii.'What is the source of water?. <br /> Response: not applicable. <br /> 45. Geotechnical analysis.The DRMS engineering group reviewed the slope stability analyses. Please <br /> respond to the two comments in the attached DRMS memo from Zach Trujillo, dated February 19,2020. <br /> i.Additional clarification on the difference between "mine fill" and "waste rock" materials and the <br /> corresponding strength parameters. <br /> Response: The Pikeview Quarry will be reclaimed using fill material with characteristics of the "waste <br /> rock" material.The "mine fill" material was used in a sensitivity analysis of the slope stability to evaluate <br /> the potential impacts of a different material. These types of sensitivity analyses are common in mine <br /> reclamation projects to help identify limitations with the design. <br /> ii. Which material profile will be used when reclaiming the Pikeview Quarry? <br /> Response: The Pikeview Quarry will be reclaimed using fill material with characteristics of the "waste <br /> rock" material. <br /> Pikeview Quarry Amendment 4, Response to Adequacy <br /> March 2, 2020 <br /> 4 <br />