Laserfiche WebLink
Barr Engineering Company <br />4700 West 77th Street • Minneapolis, MN 55435-4803 <br />Phone: 952-832-2600 • Fax: 952-832-2601 • www.barr.com An EEO Employer <br /> <br />Minneapolis, MN • Hibbing, MN • Duluth, MN • Ann Arbor, MI • Jefferson City, MO • Bismarck, ND <br />Memorandum <br />To: Chris Nyikos, Project Manager - Mountain Coal Company <br />Cc: Doug Nolte, Engineering Manager - Mountain Coal Company <br />From: Philip Solseng <br />Subject: Stability Analysis of LRP with Preparation Plant <br />Date: 8 September, 2009 <br />Project: 06/26-1004 <br />Executive Summary <br />Mountain Coal Company (MCC) is planning the addition of a new preparation plant and coal handling <br />facilities at the West Elk Mine. Geotechnical and stability considerations will be a required step in the <br />design of foundations for the preparation plant and coal handling facilities. MCC asked Barr to evaluate <br />the stability of the Lower Refuse Pile (LRP) Preparation Plant. <br />Barr's scope of work included the following tasks: <br />• Review the existing data and models used in previous stability analyses and review the regulations <br />regarding earthquake loading requirements. <br />• Evaluate loads on the LRP including static loading from the proposed Preparation Plant at the <br />specified location and dynamic loading from an appropriate earthquake. <br />• Perform a stability analysis of the LRP for both static and dynamic conditions, including loading <br />from the proposed Preparation Plant. The dynamic loading was incorporated into the stability <br />analysis using the pseudo-static method. <br />It will be shown hereafter that the stability of the LRP with the proposed Preparation Plant is stable for <br />both static and dynamic conditions according to Colorado Division of Reclamation Mining and Safety <br />(CDRMS) rules.