Laserfiche WebLink
5) Beaver Valley Road owned by Teller County <br /> Beaver Valley Road is a two lane dirt road located immediately east of the junction of CR81 and <br /> CR82 and east of the ECOSA as shown on Map C-la. The ECOSA is the only mine activity that <br /> could possibly affect the Road. It is further away from the ECOSA than CR81 therefore the <br /> demonstration for CR81 also serves to demonstrate that Beaver Valley Road will not be affected <br /> by mining activities. <br /> 6) Elkton and Cresson Mine Road owned by Teller County <br /> The Elkton and Cresson Mine Road is a two lane dirt road located south of the main Cresson <br /> Mine and the eastern portion of the Arequa Gulch Valley Leach Facility (VLF). Most of the <br /> road is a safe distance from the Arequa Gulch VLF but a small portion is inside the affected area <br /> boundary and within 560 feet of the southeastern toe of the VLF. <br /> Since Highway 67 is closer to the Arequa Gulch VLF than the Elkton Cresson Mine Road, the <br /> slope stability design and ongoing evaluation of the VLF is included in Structure 8 for Highway <br /> 67. Since the evaluation in Structure 8 shows that the State Highway 67 will not be affected by <br /> the Arequa Gulch VLF, the Elkton Cresson Mine Road will also not be affected by the VLF. <br /> The Road, which is owned by Teller County, is the closest structure to the South Cresson Mine <br /> extension of the Main Cresson Mine excavation. For this reason, the evaluation of the slope <br /> stability of this mine excavation and the potential adverse effects from blasting are included here. <br /> The Road is approximately 500 feet from the closest edge of the South Cresson Pit excavation. <br /> Main Cresson Mine and South Cresson Mine Slope Stability Evaluation <br /> The comprehensive slope stability analysis of the Main Cresson Mine was performed by Call and <br /> Nichols, Inc. in October 2011 titled"Geotechnical Slope Design Recommendations for MLE2 <br /> Mining Areas". It was submitted to DRMS at that time and was accepted as part of the mining <br /> and reclamation permit. The Report is very detailed (272 pages) and consists of evaluations of <br /> various critical slopes using extensive data, drilling, rock type analysis and modeling, etc. Call <br /> and Nicholas (CNI) have performed numerous studies of slopes at the mine beginning in 2005. <br /> All knowledge from the previous studies, field tests, observations, lab tests and drilling, RQD <br /> analysis, etc. were incorporated into the Study. The South Cresson Mine is really a south <br /> extension of the Main Cresson Mine. Both are referred to in the Study. The WHEX,North <br /> Cresson, Schist Island and South Globe Hill are also addressed in the Study but can be ignored <br /> for this evaluation. The Study Certification Page is enclosed below. <br /> 22 <br />