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D3743 - 5279 <br />UNITED STATES DEPART*tENT OF LABOR <br />:LINE SAFETY AND HEALTH ADMINISTRATION <br />TECHNICAL SUPPORT <br />MSHA BLASTING APPROVAL <br />EDNA STRIP MINE <br />The Pittsburgh and Midway Coal Company <br />Oak Creek, Colorado <br />October 20, 1981 <br />by <br />Richard L. Fischer <br />Physical Scientist <br /> <br />Issuing Office <br />Industrial and Electrical Safety Division <br />Donald Hutchinson, Chief <br />SAFETY AND HEALTH TECHNOLOGY CENTER <br />A. Z. Dimitroff, Chief <br />• P.O. Box 25361, Denver Federal Centec <br />Denver, Colorado 80225 <br />R~visE~ ii~si z <br />