U.S. Silica Company, LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Exposure limits for airborne contaminants.
COLUMBIA PLANT · 380013830 CFR 56.5001(a)/56.5005
Exposure limits for airborne contaminants.
COLUMBIA PLANT · 380013830 CFR 56.5001(a)/56.5005
Regular Safety and Health Inspection
Colado Plant · 260068010.0 on-site hours reported
Locking transformer enclosures.
Colado Plant · 260068030 CFR 56.12068 · $313.00 proposed penalty
Safety defects; examination, correction and records.
Colado Plant · 260068030 CFR 56.14100(b) · $313.00 proposed penalty
Housekeeping.
Colado Plant · 260068030 CFR 56.20003(a) · $313.00 proposed penalty
Housekeeping.
Colado Plant · 260068030 CFR 56.20003(a) · $313.00 proposed penalty
Regular Safety and Health Inspection
Colado Mine · 26006727.0 on-site hours reported
Brakes.
Colado Mine · 260067230 CFR 56.14101(a)(2) · Significant and substantial (S&S) · $959.00 proposed penalty
Safety defects; examination, correction and records.
Colado Mine · 260067230 CFR 56.14100(b) · $193.00 proposed penalty
Safe access.
Colado Mine · 260067230 CFR 56.11001 · $151.00 proposed penalty
103 (g) Written Notification Hazard Complaint Inspectio
Colado Mine · 26006729.5 on-site hours reported
103 (g) Written Notification Hazard Complaint Inspectio
Colado Plant · 26006803.8 on-site hours reported
Safe access.
Colado Mine · 260067230 CFR 56.11001 · Significant and substantial (S&S) · $288.00 proposed penalty
Parking procedures for unattended equipment.
Colado Plant · 260068030 CFR 56.14207 · Significant and substantial (S&S) · $2,312.00 proposed penalty
Safety defects; examination, correction and records.
Colado Plant · 260068030 CFR 56.14100(c) · Significant and substantial (S&S) · $5,144.00 proposed penalty
Verbal Hazard Complaint Inspections
COLUMBIA PLANT · 38001388.0 on-site hours reported
Records of training.
COLUMBIA PLANT · 380013830 CFR 46.9(c) · $151.00 proposed penalty
New miner training.
COLUMBIA PLANT · 380013830 CFR 46.5(a) · $407.00 proposed penalty
Securing gas cylinders.
COLUMBIA PLANT · 380013830 CFR 56.16005 · Significant and substantial (S&S) · $177.00 proposed penalty
Taglines, hitches, and slings.
COLUMBIA PLANT · 380013830 CFR 56.16007 · Significant and substantial (S&S) · $177.00 proposed penalty
Safe access.
COLUMBIA PLANT · 380013830 CFR 56.11001 · $151.00 proposed penalty
Spot Inspection
COLUMBIA PLANT · 38001384.8 on-site hours reported
Regular Safety and Health Inspection
FOWLKES MINE · 22004608.0 on-site hours reported
Impoundment Spot Inspection
Berkeley Plant · 46028053.5 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.