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U:S. Department of Labor Mine Safety and Health Administration <br />Pittsburgh Saiety & Health Technology Center <br />P.O. Box 18233 <br />Pittsburgh, PA 15236 <br />Mine Waste and Geotechnical Engineering Division <br />December 14, 2006 <br />~.~~ <br />MEMORANDUM FOR ALL C. DAMS <br />THROUGH: <br />FROM: <br />SUBJECT: <br />District M//anager, Distric 9 <br />~c ./ <br />L M. TERRY H <br />• ~ IO 1 Qe tM,[NT O,e l'9 <br />D1 ~ C i <br />c a <br />~aa t' <br />E~ ~ ~t~ <br />ST1TE$ O~ <br />'~ ccc ~} <br />Ci f ` ~ GuuJ <br />r, <br />CfSfili% - fo'~=;~-; <br />Chief, P/~ Saf~ and Healt Technology Center <br />y <br />KELVIN K. WU <br />Acting Chief, Mine Waste and Geotechnical <br />Engineering Division <br />~~~ <br />JOSEPH A.CYBULSKI <br />Acting Chief, Roof Control Division <br />Investigation of Ground Failure at Trapper Mining, Inc: s <br />Trapper Mine, I.D. 05-02838, Moffat County, Colorado <br />As requested by your office, Dai Choi and Sandin Phillipson made a visit to the site on <br />October 17, 2006, to investigate a lazge scale ground failure, Their findings and <br />recommendations are in Report No. MW06-065, which is attached. Please contact this <br />office if there aze any questions regarding the report. <br />Attachment <br />cc: M. Skiles - Dtrector, TS <br />T. Bentley -Chief, Safety Div., CMS&H <br />