Email me when a new MSHA incident is filed at any Zortman Mining Inc mine.
AT APPROX 10:00 AM ON 4-24-91, THE MINE EMPLOYEE WAS OPERATING A DRILL WHEN A PORTION OF THE OPEN PIT FLOOR COLLAPSED. THE OPERATOR FELL INTO THIS OPENING. SEARCH FOR THE DRILL OPERATOR INDIC ATED THAT HE WAS NOT ON THE SURFACE. THE HOLE HAD DUST COMING OUT OF THE OPENING, THUS VISIBILITY INTO THE HOLE WAS RESTRICTED. RESCUE OPERATIONS COMMENCED IMMEDIATELY.
MSHA's standard limits respirable silica to 50 micrograms per cubic metre, but MSHA publishes dust and quartz as separate files and never the silica figure itself. We derive it per sample, score it against the limit, and set the operator's injury rate against a benchmark built from the full MSHA operator record. With the 26-year penalty trail, contest posture, and fatality history. Delivered as a PDF with the underlying data as CSV.
The federal record itself stays free on this site. What costs money, and why.