Mining Incidents

O-N Minerals (Chemstone Company)Operator

Controlled by Carmeuse Holding SA
MSHA Operator ID: L16758
Fatalities
2
Total incidents
181
Mines on record
9
Years on record
2000–2026
For counsel + compliance teams

Get an email the moment a new MSHA-reportable accident lands at any mine on file under O-N Minerals (Chemstone Company). Useful for 105(c) defense intake, FMSHRC docket prep, and active client monitoring.

Top causes

  • MACHINERY1 fatality · 18 non-fatal
  • POWERED HAULAGE1 fatality · 6 non-fatal
  • HANDLING OF MATERIALS60 non-fatal
  • SLIP OR FALL OF PERSON43 non-fatal
  • HANDTOOLS (NONPOWERED)27 non-fatal
  • OTHER11 non-fatal

Incident timeline

2026
1
2025
1
2024
2
2023
4
2022
3
2021
8
2020
7 (1f)
2019
6
2018
7
2017
6
2016
15
2015
10
2014
10
2013
3
2012
9
2011
6
2010
4
2009
7
2008
4
2007
11
2006
10
2005
10
2004
12
2003
6
2002
8
2001
1
2000
10 (1f)

Mines on record

Fatalities under this operator

2 recorded
Caught in, under or between a moving and a stationary object

While loading a face on level 3, NW2, the man basket of the powder truck raised up into the roof of the mine causing a fatal incident. The accident is still under investigation by the operator and the Mine Safety and Health Administration.

Caught in, under or between a moving and a stationary object

EMPLOYEE WAS ATTEMPTING TO REMOVE STONE BUILDUP FROM UNDER SHAFT KILN CARRIAGE COUNTER WEIGHT. HE CLIMBED OVER A GUARD INTO RESTRICTED AREA WHERE THE WEIGHT WAS LOCATED ONLY INCHES OVER HIS HE AD. THE WEIGHT MADE ITS SCHEDULED DESCENT AND EE WAS TRAPPED UNDER IT.