U.S. Silica Company, LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Compliance Follow-up Inspection
COLUMBIA PLANT · 38001380.3 on-site hours reported
Safety defects; examination, correction and records.
Ottawa Plant · 110101330 CFR 56.14100(c) · Significant and substantial (S&S) · $465.00 proposed penalty
Safe access.
Ottawa Plant · 110101330 CFR 56.11001 · $209.00 proposed penalty
Inspection.
Ottawa Plant · 110101330 CFR 56.4201(b) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Ottawa Plant · 110101330 CFR 56.14100(c) · $226.00 proposed penalty
Brakes.
Ottawa Plant · 110101330 CFR 56.14101(a)(2) · $151.00 proposed penalty
Safety defects; examination, correction and records.
Ottawa Plant · 110101330 CFR 56.14100(c) · $313.00 proposed penalty
Inspection and cover plates.
Ottawa Plant · 110101330 CFR 56.12032 · $245.00 proposed penalty
Identification of power switches.
Ottawa Plant · 110101330 CFR 56.12018 · $209.00 proposed penalty
Temporary, portable containers.
Ottawa Plant · 110101330 CFR 47.44(b) · $209.00 proposed penalty
Construction and maintenance of guards.
Ottawa Plant · 110101330 CFR 56.14112(a)(2) · $209.00 proposed penalty
Unguarded conveyors with adjacent travelways.
Ottawa Plant · 110101330 CFR 56.14109 · $151.00 proposed penalty
Safety defects; examination, correction and records.
Ottawa Plant · 110101330 CFR 56.14100(c) · $209.00 proposed penalty
Parking procedures for unattended equipment.
Ottawa Plant · 110101330 CFR 56.14207 · $151.00 proposed penalty
Warning signs.
Ottawa Plant · 110101330 CFR 56.4101 · $209.00 proposed penalty
Temporary, portable containers.
Ottawa Plant · 110101330 CFR 47.44(b) · $209.00 proposed penalty
Inspection.
Rockwood Plant · 200060830 CFR 56.4201(b) · $151.00 proposed penalty
Housekeeping.
Rockwood Plant · 200060830 CFR 56.20003(a) · $151.00 proposed penalty
Electrical conductors.
Rockwood Plant · 200060830 CFR 56.12004 · $151.00 proposed penalty
Regular Safety and Health Inspection
Rockwood Plant · 200060831.3 on-site hours reported
Identification of power switches.
Rockwood Plant · 200060830 CFR 56.12018 · $151.00 proposed penalty
Housekeeping.
Rockwood Plant · 200060830 CFR 56.20003(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
Ottawa Plant · 110101357.8 on-site hours reported
Regular Safety and Health Inspection
Clark Operations · 26006774.5 on-site hours reported
Testing grounding systems.
Ottawa Plant · 110101330 CFR 56.12028 · $549.00 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.