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3 <br /> Backup plans to be implemented if the flow of the river <br /> rises above the design capacity of the temporary <br /> crossing are to rebuild the temporary crossing , or to <br /> remove the remnants of the temporary crossing and <br /> proceed with bridge construction without temporary <br /> access to both sides of the river . The intent of using <br /> river-run material to construct the temporary crossing <br /> is to protect the Purgatoire River from excessive <br /> sedimentation in the event that the crossing is washed <br /> out by unanticipated high flows of the River. The <br /> purpose of the temporary crossing is to provide <br /> convenient access to the mine during bridge <br /> construction and to aid in the construction of the <br /> bridge itself. Access to the mine is possible by way <br /> of Apache Canyon , but it is a longer way into the mine <br /> and access to the mine by this route would occur on <br /> roads that were built to serve the needs of ranchers <br /> and are not entirely satisfactory for regular use by <br /> numerous vehicles . <br /> 5 . As concern #2 has been addressed , no response is <br /> required . <br /> 6 . No response is required . <br /> 7 . The area under the bridge span will be riprapped with <br /> river-run material . It is not known if the existing <br /> portion of the road to be removed lies on bedrock or on <br /> river-run material . If the road fill lies on river-run <br /> material , that material will be left in place . If the <br /> road fill lies on bedrock, river-run material will be <br /> placed after the bridge is constructed . The source of <br /> the material would be from the temporary access road <br /> when it is removed . This would not require a great <br /> deal of material and the remainder of the river-run <br /> material would be placed back in its original position . <br /> Mining Dept . <br /> DWZ/as <br /> MEPKFP <br />