U.S. Silica Company, LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Protective equipment and clothing for hazards and irritants.
COLUMBIA PLANT · 380013830 CFR 56.15006 · $151.00 proposed penalty
Construction and maintenance of guards.
COLUMBIA PLANT · 380013830 CFR 56.14112(b) · $151.00 proposed penalty
Moving machine parts.
Berkeley Plant · 460280530 CFR 56.14107(a) · Significant and substantial (S&S) · $245.00 proposed penalty
Spot Inspection
Colado Plant · 26006800.0 on-site hours reported
103 (g) Written Notification Hazard Complaint Inspectio
Colado Plant · 260068011.8 on-site hours reported
Regular Safety and Health Inspection
Hurtsboro Plant · 01006174.0 on-site hours reported
Regular Safety and Health Inspection
Berkeley Plant · 460280559.8 on-site hours reported
Safe access.
Berkeley Plant · 460280530 CFR 56.11001 · Significant and substantial (S&S) · $465.00 proposed penalty
Handling of materials
Celatom Mine · 3503237No dys awy frm wrk,no rstr act
Accident narrative
Over the road driver was removing a tow rope from the mounted bracket on a loader. Employee began lifting the tow rope overhead when they felt a pop in their left shoulder, followed by immediate discomfort in that shoulder. Employee was evaluated and diagnosed with a strain to their left shoulder.
Regular Safety and Health Inspection
EP Engineered Clays Corporation · 220041522.0 on-site hours reported
Compliance Follow-up Inspection
Fernley Operations · 26019500.5 on-site hours reported
Compliance Follow-up Inspection
COLUMBIA PLANT · 38001381.0 on-site hours reported
Impoundment Spot Inspection
Berkeley Plant · 46028055.3 on-site hours reported
Compliance Follow-up Inspection
COLUMBIA PLANT · 38001382.3 on-site hours reported
Handling of materials
Pacific Plant · 2300544Days restricted activity only
Accident narrative
Employee was helping free a frozen switch when they lost grip and stumbled backwards. Right knee injury occurred and employee was able to continue work activities until surgery restrictions put into place on 3/26/2026
Slip or fall of person
Mauricetown Plant · 2800526Days away from work only
Accident narrative
Winter blizzard and changing weather conditions created slippery surfaces. Ice developed on top platform dust collector and created a slippery surface. After performing maintenance task to thaw frozen air lines, employee sustained a left ankle injury after ascending ladder and stepping on the top platform for accessing the dust collector resulting in restricted duty.
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Clark Operations · 260067730 CFR 50.30(a) · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Clark Operations · 260067730 CFR 50.30(a) · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Clark Operations · 260067730 CFR 50.30(a) · $151.00 proposed penalty
Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.
Clark Operations · 260067730 CFR 50.30(a) · $151.00 proposed penalty
Construction and maintenance of guards.
Clark Operations · 260067730 CFR 56.14112(a)(1) · $151.00 proposed penalty
Requirement for container labels.
Fernley Operations · 260195030 CFR 47.41(a) · $151.00 proposed penalty
Inspection.
Fernley Operations · 260195030 CFR 56.4201(a)(2) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Fernley Operations · 260195030 CFR 56.14100(c) · Significant and substantial (S&S) · $432.00 proposed penalty
Inspection.
Fernley Operations · 260195030 CFR 56.4201(a)(2) · $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.
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.