U.S. Silica Company, LLC safety activity
MSHA violations, accident reports and inspections across the current mine portfolio.
Safety activity
Verbal Hazard Complaint Inspections
Jackson Plant · 40029373.0 on-site hours reported
Regular Safety and Health Inspection
Jackson Plant · 40029377.5 on-site hours reported
Verbal Hazard Complaint Inspections
Jackson Plant · 40029374.0 on-site hours reported
Machinery, equipment, and tools.
Celatom Mine · 350323730 CFR 56.14205 · $151.00 proposed penalty
Brakes.
Mill Creek Plant #39 · 340083630 CFR 56.14101(a)(2) · $151.00 proposed penalty
General requirements.
Mill Creek Plant #39 · 340083630 CFR 56.4200(b)(2) · $398.00 proposed penalty
Locking transformer enclosures.
Mill Creek Plant #39 · 340083630 CFR 56.12068 · $193.00 proposed penalty
Safety defects; examination, correction and records.
Mill Creek Plant #39 · 340083630 CFR 56.14100(b) · $151.00 proposed penalty
Regular Safety and Health Inspection
Mill Creek Plant #39 · 340083612.8 on-site hours reported
Compliance Follow-up Inspection
Ottawa Plant · 11010132.5 on-site hours reported
Handtools (nonpowered)
Mapleton Depot Plant · 3603122No dys awy frm wrk,no rstr act
Accident narrative
The employee sustained a left forearm laceration while using a pair of scissors as a draw knife to cut scrap cardboard into smaller pieces for disposal. The employee was pulling the scissors toward themselves when the scissors slipped and cut into their forearm, 4" above the wrist and glove, causing a laceration requiring 4 stitches.
Verbal Hazard Complaint Inspections
Ottawa Plant · 110101310.0 on-site hours reported
Spot Inspection
Ottawa Plant · 11010131.0 on-site hours reported
Housekeeping.
Ottawa Plant · 110101330 CFR 56.20003(a) · Significant and substantial (S&S) · $883.00 proposed penalty
Flying or falling materials.
Ottawa Plant · 110101330 CFR 56.14110 · $177.00 proposed penalty
Slip or fall of person
Berkeley Plant · 4602805Days restricted activity only
Accident narrative
While cleaning a back-up camera, employee fell approximately 3 feet from the side ladder, striking EE's left shoulder. The employee received only diagnostic care until January 21, 2026, when EE began physical therapy.
Warning signs.
Ottawa Plant · 110101330 CFR 56.4101 · $151.00 proposed penalty
Safe access.
Ottawa Plant · 110101330 CFR 56.11001 · Significant and substantial (S&S) · $177.00 proposed penalty
Construction and maintenance of ladders.
Ottawa Plant · 110101330 CFR 56.11003 · $245.00 proposed penalty
Inspection.
Ottawa Plant · 110101330 CFR 56.4201(a)(2) · $245.00 proposed penalty
Safety defects; examination, correction and records.
Ottawa Plant · 110101330 CFR 56.14100(b) · $245.00 proposed penalty
Protection for openings around travelways.
Ottawa Plant · 110101330 CFR 56.11012 · Significant and substantial (S&S) · $1,219.00 proposed penalty
New miner training.
Ottawa Plant · 110101330 CFR 46.5 · Significant and substantial (S&S) · $168.00 proposed penalty
Regular Safety and Health Inspection
Ottawa Plant · 110101368.3 on-site hours reported
Electrical conductors.
Ottawa Plant · 110101330 CFR 56.12004 · $398.00 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.