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UNITED STATES DEPARTMENT OF LABOR <br />MINE SAFETY AND HEALTH ADMINISTRATION <br />PITTSBURGH SAFETY AND HEALTH TECHNOLOGY CENTER <br />MINE WASTE AND GEOTECHNICAL ENGINEERING DIVISION <br />COCHRANS MILL ROAD <br />P.O. BOX 18233 <br />PITTSBURGH, PENNSYLVANIA 15236 <br />REPORT NO. MW09-008 <br />FIELD INVESTIGATION OF PIT SLOPE FAILURE <br />TRANSIT MIX CONCRETE <br />PIKE VIEW QUARRY <br />MINE I.D. NO. 05-01443 <br />COLORADO SPRINGS, EL PASO COUNTY, COLORADO <br />FEBRUARY 23, 2009 <br />BY <br />PAUL J. DONAHUE <br />CIVIL ENGINEER <br />AND <br />ERIC J. GOTTHELD <br />CIVIL ENGINEER