O-N Minerals, Cedarville Operation safety activity
MSHA violations, accident reports and inspections.
Safety activity
103 (g) Written Notification Hazard Complaint Inspectio
6.0 on-site hours reported
Slip or fall of person
Days away from work only
Accident narrative
EE fell 10ft 10in while leaning out a 11-1/2 in opening between a screen and adjacent handrail trying to look at the screen springs.
Housekeeping.
30 CFR 56.20003(a) · Significant and substantial (S&S) · $9,757.00 proposed penalty
Hand-held power tools.
30 CFR 56.14116(a) · $267.00 proposed penalty
Regular Safety and Health Inspection
19.0 on-site hours reported
Handling of materials
Dys awy frm wrk & restrctd act
Accident narrative
ee was pulling the slack out of a wash hose when they felt a pop in their back. Incident occurred on 8/15/2025 - ee was evaluated by medical professional and released to work without restrictions. Pain was not getting better so went back to the doctor and was put off work on 9/8/2025.
Housekeeping.
30 CFR 56.20003(b) · $151.00 proposed penalty
Protection of persons at switchgear.
30 CFR 56.12020 · Significant and substantial (S&S) · $1,320.00 proposed penalty
Horns and backup alarms.
30 CFR 56.14132(a) · $151.00 proposed penalty
Parking procedures for unattended equipment.
30 CFR 56.14207 · $151.00 proposed penalty
Parking procedures for unattended equipment.
30 CFR 56.14207 · $151.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 56.14100(a) · $151.00 proposed penalty
Temporary, portable containers.
30 CFR 47.44(b) · $151.00 proposed penalty
Moving machine parts.
30 CFR 56.14107(a) · Significant and substantial (S&S) · $336.00 proposed penalty
Regular Safety and Health Inspection
49.0 on-site hours reported
Insulation and fittings for power wires and cables.
30 CFR 56.12008 · $151.00 proposed penalty
Electrical conductors.
30 CFR 56.12004 · $151.00 proposed penalty
Electrical conductors.
30 CFR 56.12004 · $151.00 proposed penalty
Moving machine parts.
30 CFR 56.14107(a) · Significant and substantial (S&S) · $336.00 proposed penalty
Safe access.
30 CFR 56.11001 · Significant and substantial (S&S) · $755.00 proposed penalty
Safety defects; examination, correction and records.
30 CFR 56.14100(b) · $1,126.00 proposed penalty
Handling of materials
Days 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.
Inspection.
30 CFR 56.4201(a)(3) · $151.00 proposed penalty
Inspection and cover plates.
30 CFR 56.12032 · $151.00 proposed penalty
Oxygen cylinder storage.
30 CFR 56.4601 · $151.00 proposed penalty
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.
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.