O-N Minerals (Michigan) Company safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Correction of dangerous conditions.
O-N Minerals - Calcite Operation · 200006230 CFR 56.12030 · $193.00 proposed penalty
Slip or fall of person
O-N Minerals - Calcite Operation · 2000062Days restricted activity only
Accident narrative
ee was spotting a haul truck, and as the ee was walking backwards, tripped over some loose stone/uneven ground and fell resulting in lacerations to hands and legs.
Handling of materials
O-N Minerals - Calcite Operation · 2000062Days restricted activity only
Accident narrative
Employees had a shaft in the upright position in the elevator. when they arrived their floor, one ee held the top while the other bent down to pick up the bottom end. Upon lifting, the ee felt a pop sensation in the groin area. The shaft weighed appx 100 lbs according to ee's. EE sought medical treatment on 3/6 and was put on work restrictions.
Handling of materials
O-N Minerals, Cedarville Operation · 2000061Days away from work only
Accident narrative
Employee was rolling a piece of pipe on the welding table and it hit a piece of angle that was also on the table causing it to fall off and land on employee's left foot just behind the steel toe leaving it bruised and swollen. Employee did not seek medical attention until a later date- ee was put off work eff 3/6/25.
Compliance Follow-up Inspection
Carmeuse - Port Inland Operation · 20009852.0 on-site hours reported
Hand-held power tools.
Carmeuse - Port Inland Operation · 200098530 CFR 56.14116(a) · $151.00 proposed penalty
Brakes.
Carmeuse - Port Inland Operation · 200098530 CFR 56.14101(a)(2) · $151.00 proposed penalty
Regular Safety and Health Inspection
Carmeuse - Port Inland Operation · 200098522.0 on-site hours reported
Storage facilities.
Carmeuse - Port Inland Operation · 200098530 CFR 56.4430(b)(3) · $151.00 proposed penalty
Inspection.
Carmeuse - Port Inland Operation · 200098530 CFR 56.4201(a)(1) · $151.00 proposed penalty
Inspection.
O-N Minerals, Cedarville Operation · 200006130 CFR 56.4201(a)(3) · $151.00 proposed penalty
Inspection and cover plates.
O-N Minerals, Cedarville Operation · 200006130 CFR 56.12032 · $151.00 proposed penalty
Oxygen cylinder storage.
O-N Minerals, Cedarville Operation · 200006130 CFR 56.4601 · $151.00 proposed penalty
Inspection.
O-N Minerals, Cedarville Operation · 200006130 CFR 56.4201(a)(2) · $151.00 proposed penalty
Regular Safety and Health Inspection
O-N Minerals, Cedarville Operation · 200006120.3 on-site hours reported
Electrical conductors.
O-N Minerals, Cedarville Operation · 200006130 CFR 56.12004 · $151.00 proposed penalty
Impoundment Spot Inspection
O-N Minerals, Cedarville Operation · 20000611.8 on-site hours reported
Impoundment Spot Inspection
O-N Minerals - Calcite Operation · 20000621.8 on-site hours reported
Sources and definitions
MSHA Violations (issue date), Accidents (accident date) and Inspections (begin date).
Violation titles use current CFR headings to identify the cited rule; they are not the inspector’s account of what happened.
Status is from the current MSHA Mines snapshot, not the selected reporting period. Closed records can retain their last reported controller/operator.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.