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U.S. Department of Labor <br />Mine Safety and Health Administration <br />Pittsburgh Safety & Health Technology Center <br />P.O. Box 18233 <br />Pittsburgh, PA 15236 <br />Mine Waste and Geotechnical Engineering Division <br />r) - <br />February 23, 2009 r-%a ( GLAJ <br />MEMORANDUM FOR RICHARD LAUFENBERG /V <br />District Manager, Rocky Mountain District <br />Metal/ Nonmetal Mine Safety and Health <br />lb h I fG? <br />QJ+1 • r , <br />VvS/ ' ,F <br />?i T = <br />lJ yr1"f i.5 nF <br />RECEIVED <br />MAR 10 2009 <br />DWWw of Redamadon, <br />M#it aid r <br />/- 60' <br />THROUGH: M. TERRY HOVH <br />ief, Pittsburgh Safety and Health Technology Center <br />I ?I <br />FROM: STANLEY J. MICHALEK <br />Chief, Mine Waste and Geotechnical Engineering Division <br />SUBJECT: Field Investigation of Pit Slope Failure at Transit Mix Concrete, <br />Pike View Quarry, Mine I.D. No. 05-01443, Colorado Springs, El <br />Paso County, Colorado M-L9 '11-7 - a I II <br />As requested, engineers from the Mine Waste and Geotechnical Engineering Division <br />conducted a field investigation at the Pike View Aggregate Quarry, located in Colorado <br />Springs, Colorado. The purpose of the investigation was to investigate an ongoing, large, <br />mass pit slope failure that occurred at about 7:15 a.m. on December 2, 2008. <br />The engineers visited the quarry on December 4 and 5, 2008, and were accompanied by <br />Mr. Tom Stefansky and Mr. Billy Schroeder from the Denver, Colorado, Field Office. <br />Report No. MW09-008, which is attached, provides the details of the investigation, the <br />results of the evaluation, and recommendations for addressing the situation. Please <br />contact this office if you have any questions regarding this report. <br />Attachment <br />cc: M. Skiles - Director, TS <br />W. Wilson - Chief, Safety and Health Division, MNM